Version 7.4.4: Added ConcurrentPropertyBag (GitHub Issue #531); [V8] added V8ScriptEngineFlags.UseSynchronizationContexts (GitHub Discussion #509); added ScriptEngine.CustomAttributeLoader (GitHub Discussion #540); fixed property accessor recursion bug (GitHub Issue #541); added ScriptEngine.HostData and CustomAttributeLoader.Default; updated API documentation. Tested with V8 11.8.172.15.

ClearScript/CanonicalRefTable.cs

@@ -40,9 +40,9 @@ namespace Microsoft.ClearScript
                         type == typeof(TimeSpan) ||
                         type == typeof(Guid) ||
                     #if NET471_OR_GREATER || NETCOREAPP2_0_OR_GREATER || NETSTANDARD2_1_OR_GREATER
-                        type.GetOrLoadCustomAttributes<System.Runtime.CompilerServices.IsReadOnlyAttribute>(false).Any() ||
+                        type.GetOrLoadCustomAttributes<System.Runtime.CompilerServices.IsReadOnlyAttribute>(null, false).Any() ||
                     #endif
-                        type.GetOrLoadCustomAttributes<ImmutableValueAttribute>(false).Any())
+                        type.GetOrLoadCustomAttributes<ImmutableValueAttribute>(null, false).Any())
                     {
                         map = (ICanonicalRefMap)typeof(CanonicalRefMap<>).MakeGenericType(type).CreateInstance();
                     }

ClearScript/CustomAttributeCache.cs

@@ -0,0 +1,136 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using Microsoft.ClearScript.Util;
+
+namespace Microsoft.ClearScript
+{
+    internal sealed class CustomAttributeCache
+    {
+        private readonly ConditionalWeakTable<ICustomAttributeProvider, Entry> table = new ConditionalWeakTable<ICustomAttributeProvider, Entry>();
+
+        public T[] GetOrLoad<T>(CustomAttributeLoader loader, ICustomAttributeProvider resource, bool inherit) where T : Attribute
+        {
+            lock (table)
+            {
+                return GetOrLoad<T>(loader, table.GetOrCreateValue(resource), resource, inherit);
+            }
+        }
+
+        private T[] GetOrLoad<T>(CustomAttributeLoader loader, Entry entry, ICustomAttributeProvider resource, bool inherit) where T : Attribute
+        {
+            if (entry.TryGet<T>(out var attrs))
+            {
+                return attrs;
+            }
+
+            attrs = Load<T>(GetIsBypass(entry, resource) ? CustomAttributeLoader.Default : loader, resource, inherit);
+            entry.Add(attrs);
+
+            return attrs;
+        }
+
+        private static T[] Load<T>(CustomAttributeLoader loader, ICustomAttributeProvider resource, bool inherit) where T : Attribute
+        {
+            return loader.LoadCustomAttributes<T>(resource, inherit) ?? ArrayHelpers.GetEmptyArray<T>();
+        }
+
+        private bool GetIsBypass(ICustomAttributeProvider resource)
+        {
+            // ReSharper disable once InconsistentlySynchronizedField
+            return GetIsBypass(table.GetOrCreateValue(resource), resource);
+        }
+
+        private bool GetIsBypass(Entry entry, ICustomAttributeProvider resource)
+        {
+            if (!entry.IsBypass.HasValue)
+            {
+                entry.IsBypass = GetIsBypassInternal(resource);
+            }
+
+            return entry.IsBypass.Value;
+        }
+
+        private bool GetIsBypassInternal(ICustomAttributeProvider resource)
+        {
+            if (Load<BypassCustomAttributeLoaderAttribute>(CustomAttributeLoader.Default, resource, false).Length > 0)
+            {
+                return true;
+            }
+
+            var parent = GetParent(resource);
+            if (parent != null)
+            {
+                return GetIsBypass(parent);
+            }
+
+            return false;
+        }
+
+        private static ICustomAttributeProvider GetParent(ICustomAttributeProvider resource)
+        {
+            if (resource is ParameterInfo parameter)
+            {
+                return parameter.Member;
+            }
+
+            if (resource is Type type)
+            {
+                return (type.DeclaringType as ICustomAttributeProvider) ?? type.Module;
+            }
+
+            if (resource is MemberInfo member)
+            {
+                return member.DeclaringType;
+            }
+
+            if (resource is Module module)
+            {
+                return module.Assembly;
+            }
+
+            return null;
+        }
+
+        #region Nested type: Entry
+
+        // ReSharper disable ClassNeverInstantiated.Local
+
+        private sealed class Entry
+        {
+            private readonly Dictionary<Type, object> map = new Dictionary<Type, object>();
+
+            public bool? IsBypass { get; set; }
+
+            public void Add<T>(T[] attrs)
+            {
+                map.Add(typeof(T), attrs);
+            }
+
+            public bool TryGet<T>(out T[] attrs)
+            {
+                if (map.TryGetValue(typeof(T), out var attrsObject))
+                {
+                    attrs = attrsObject as T[];
+                    return true;
+                }
+
+                attrs = null;
+                return false;
+            }
+        }
+
+        // ReSharper restore ClassNeverInstantiated.Local
+
+        #endregion
+    }
+
+    [AttributeUsage(AttributeTargets.All, Inherited = false)]
+    internal sealed class BypassCustomAttributeLoaderAttribute : Attribute
+    {
+    }
+}

ClearScript/CustomAttributeLoader.cs

@@ -12,6 +12,8 @@ namespace Microsoft.ClearScript
     /// </summary>
     public class CustomAttributeLoader
     {
+        private readonly CustomAttributeCache cache = new CustomAttributeCache();
+
         // ReSharper disable EmptyConstructor
 
         /// <summary>
@@ -22,6 +24,11 @@ namespace Microsoft.ClearScript
             // the help file builder (SHFB) insists on an empty constructor here
         }
 
+        /// <summary>
+        /// Gets the default custom attribute loader.
+        /// </summary>
+        public static CustomAttributeLoader Default { get; } = new CustomAttributeLoader();
+
         // ReSharper restore EmptyConstructor
 
         /// <summary>
@@ -60,5 +67,10 @@ namespace Microsoft.ClearScript
 
             return resource.GetCustomAttributes(typeof(T), inherit).OfType<T>().ToArray();
         }
+
+        internal T[] GetOrLoad<T>(ICustomAttributeProvider resource, bool inherit) where T : Attribute
+        {
+            return cache.GetOrLoad<T>(this, resource, inherit);
+        }
     }
 }

ClearScript/CustomAttributes.NetFramework.cs

@@ -1,21 +0,0 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// Licensed under the MIT license.
-
-using System.Reflection;
-using System.Runtime.CompilerServices;
-
-namespace Microsoft.ClearScript
-{
-    internal static partial class CustomAttributes
-    {
-        private static ConditionalWeakTable<ICustomAttributeProvider, CacheEntry> cache = new ConditionalWeakTable<ICustomAttributeProvider, CacheEntry>();
-
-        public static void ClearCache()
-        {
-            lock (cacheLock)
-            {
-                cache = new ConditionalWeakTable<ICustomAttributeProvider, CacheEntry>();
-            }
-        }
-    }
-}

ClearScript/CustomAttributes.NetStandard.cs

@@ -1,21 +0,0 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// Licensed under the MIT license.
-
-using System.Reflection;
-using System.Runtime.CompilerServices;
-
-namespace Microsoft.ClearScript
-{
-    internal static partial class CustomAttributes
-    {
-        private static readonly ConditionalWeakTable<ICustomAttributeProvider, CacheEntry> cache = new ConditionalWeakTable<ICustomAttributeProvider, CacheEntry>();
-
-        public static void ClearCache()
-        {
-            lock (cacheLock)
-            {
-                cache.Clear();
-            }
-        }
-    }
-}

ClearScript/CustomAttributes.cs

@@ -1,154 +1,23 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
 using System;
-using System.Collections.Generic;
 using System.Reflection;
 using Microsoft.ClearScript.Util;
 
 namespace Microsoft.ClearScript
 {
-    internal static partial class CustomAttributes
+    internal static class CustomAttributes
     {
-        private static readonly object cacheLock = new object();
+        public static T[] GetOrLoad<T>(IHostContext context, ICustomAttributeProvider resource, bool inherit) where T : Attribute
-
-        public static T[] GetOrLoad<T>(ICustomAttributeProvider resource, bool inherit) where T : Attribute
         {
-            lock (cacheLock)
+            var loader = context?.CustomAttributeLoader ?? HostSettings.CustomAttributeLoader;
+            return loader.GetOrLoad<T>(resource, inherit);
+        }
+
+        public static bool Has<T>(IHostContext context, ICustomAttributeProvider resource, bool inherit) where T : Attribute
         {
-                return GetOrLoad<T>(cache.GetOrCreateValue(resource), resource, inherit);
+            return GetOrLoad<T>(context, resource, inherit).Length > 0;
         }
     }
-
-        public static bool Has<T>(ICustomAttributeProvider resource, bool inherit) where T : Attribute
-        {
-            lock (cacheLock)
-            {
-                return Has<T>(cache.GetOrCreateValue(resource), resource, inherit);
-            }
-        }
-
-        private static T[] GetOrLoad<T>(CacheEntry entry, ICustomAttributeProvider resource, bool inherit) where T : Attribute
-        {
-            if (entry.TryGet<T>(out var attrs))
-            {
-                return attrs;
-            }
-
-            attrs = GetOrLoad<T>(GetIsBypass(entry, resource), resource, inherit);
-            entry.Add(attrs);
-
-            return attrs;
-        }
-
-        private static bool Has<T>(CacheEntry entry, ICustomAttributeProvider resource, bool inherit) where T : Attribute
-        {
-            return GetOrLoad<T>(entry, resource, inherit).Length > 0;
-        }
-
-        private static T[] GetOrLoad<T>(bool isBypass, ICustomAttributeProvider resource, bool inherit) where T : Attribute
-        {
-            var loader = isBypass ? HostSettings.DefaultCustomAttributeLoader : HostSettings.CustomAttributeLoader;
-            return loader.LoadCustomAttributes<T>(resource, inherit) ?? ArrayHelpers.GetEmptyArray<T>();
-        }
-
-        private static bool Has<T>(bool isBypass, ICustomAttributeProvider resource, bool inherit) where T : Attribute
-        {
-            return GetOrLoad<T>(isBypass, resource, inherit).Length > 0;
-        }
-
-        private static bool GetIsBypass(ICustomAttributeProvider resource)
-        {
-            // ReSharper disable once InconsistentlySynchronizedField
-            return GetIsBypass(cache.GetOrCreateValue(resource), resource);
-        }
-
-        private static bool GetIsBypass(CacheEntry entry, ICustomAttributeProvider resource)
-        {
-            if (!entry.IsBypass.HasValue)
-            {
-                entry.IsBypass = GetIsBypassInternal(resource);
-            }
-
-            return entry.IsBypass.Value;
-        }
-
-        private static bool GetIsBypassInternal(ICustomAttributeProvider resource)
-        {
-            if (Has<BypassCustomAttributeLoaderAttribute>(true, resource, false))
-            {
-                return true;
-            }
-
-            var parent = GetParent(resource);
-            if (parent != null)
-            {
-                return GetIsBypass(parent);
-            }
-
-            return false;
-        }
-
-        private static ICustomAttributeProvider GetParent(ICustomAttributeProvider resource)
-        {
-            if (resource is ParameterInfo parameter)
-            {
-                return parameter.Member;
-            }
-
-            if (resource is Type type)
-            {
-                return (type.DeclaringType as ICustomAttributeProvider) ?? type.Module;
-            }
-
-            if (resource is MemberInfo member)
-            {
-                return member.DeclaringType;
-            }
-
-            if (resource is Module module)
-            {
-                return module.Assembly;
-            }
-
-            return null;
-        }
-
-        #region Nested type: CacheEntry
-
-        // ReSharper disable ClassNeverInstantiated.Local
-
-        private sealed class CacheEntry
-        {
-            private readonly Dictionary<Type, object> map = new Dictionary<Type, object>();
-
-            public bool? IsBypass { get; set; }
-
-            public void Add<T>(T[] attrs)
-            {
-                map.Add(typeof(T), attrs);
-            }
-
-            public bool TryGet<T>(out T[] attrs)
-            {
-                if (map.TryGetValue(typeof(T), out var attrsObject))
-                {
-                    attrs = attrsObject as T[];
-                    return true;
-                }
-
-                attrs = null;
-                return false;
-            }
-        }
-
-        // ReSharper restore ClassNeverInstantiated.Local
-
-        #endregion
-    }
-
-    [AttributeUsage(AttributeTargets.All, Inherited = false)]
-    internal sealed class BypassCustomAttributeLoaderAttribute : Attribute
-    {
-    }
 }

ClearScript/Exports/VersionSymbols.h

@@ -5,7 +5,7 @@
 
 #pragma once
 
-#define CLEARSCRIPT_VERSION_STRING "7.4.3"
+#define CLEARSCRIPT_VERSION_STRING "7.4.4"
-#define CLEARSCRIPT_VERSION_COMMA_SEPARATED 7,4,3
+#define CLEARSCRIPT_VERSION_COMMA_SEPARATED 7,4,4
-#define CLEARSCRIPT_VERSION_STRING_INFORMATIONAL "7.4.3"
+#define CLEARSCRIPT_VERSION_STRING_INFORMATIONAL "7.4.4"
 #define CLEARSCRIPT_FILE_FLAGS 0L

ClearScript/ExtendedHostFunctions.cs

@@ -299,7 +299,7 @@ namespace Microsoft.ClearScript
                     }
                 }
             }
-            else if (type.IsImport && (type.Assembly.GetOrLoadCustomAttribute<ImportedFromTypeLibAttribute>(false) != null))
+            else if (type.IsImport && (type.Assembly.GetOrLoadCustomAttribute<ImportedFromTypeLibAttribute>(ScriptEngine.Current, false) != null))
             {
                 type.Assembly.GetReferencedEnums().ForEach(collection.AddType);
                 return collection;

ClearScript/ExtensionMethods.cs

@@ -17,28 +17,28 @@ namespace Microsoft.ClearScript
 
         public ExtensionMethodSummary Summary { get; private set; } = new ExtensionMethodSummary();
 
-        public bool ProcessType(Type type, IHostContext context)
+        public bool ProcessType(IHostContext context, Type type)
         {
             Debug.Assert(type.IsSpecific());
-            if (!table.ContainsKey(type) && type.HasExtensionMethods())
+            if (!table.ContainsKey(type) && type.HasExtensionMethods(context))
             {
                 const BindingFlags bindFlags = BindingFlags.Public | BindingFlags.Static;
-                table[type] = type.GetMethods(bindFlags).Where(method => IsScriptableExtensionMethod(method, context)).ToArray();
+                table[type] = type.GetMethods(bindFlags).Where(method => IsScriptableExtensionMethod(context, method)).ToArray();
-                RebuildSummary();
+                RebuildSummary(context);
                 return true;
             }
 
             return false;
         }
 
-        public void RebuildSummary()
+        public void RebuildSummary(IHostContext context)
         {
-            Summary = new ExtensionMethodSummary(table);
+            Summary = new ExtensionMethodSummary(context, table);
         }
 
-        private static bool IsScriptableExtensionMethod(MethodInfo method, IHostContext context)
+        private static bool IsScriptableExtensionMethod(IHostContext context, MethodInfo method)
         {
-            return method.IsScriptable(context) && method.HasCustomAttributes<ExtensionAttribute>(false);
+            return method.IsScriptable(context) && method.HasCustomAttributes<ExtensionAttribute>(context, false);
         }
     }
 
@@ -51,11 +51,11 @@ namespace Microsoft.ClearScript
             MethodNames = ArrayHelpers.GetEmptyArray<string>();
         }
 
-        public ExtensionMethodSummary(Dictionary<Type, MethodInfo[]> table)
+        public ExtensionMethodSummary(IHostContext context, Dictionary<Type, MethodInfo[]> table)
         {
             Types = table.Keys.ToArray();
             Methods = table.SelectMany(pair => pair.Value).ToArray();
-            MethodNames = Methods.Select(method => method.GetScriptName()).ToArray();
+            MethodNames = Methods.Select(method => method.GetScriptName(context)).ToArray();
         }
 
         public Type[] Types { get; }

ClearScript/HostFunctions.cs

@@ -643,7 +643,7 @@ namespace Microsoft.ClearScript
         public T flags<T>(params T[] args)
         {
             var type = typeof(T);
-            if (!type.IsFlagsEnum())
+            if (!type.IsFlagsEnum(ScriptEngine.Current))
             {
                 throw new InvalidOperationException(MiscHelpers.FormatInvariant("{0} is not a flag set type", type.GetFullFriendlyName()));
             }

ClearScript/HostItem.InvokeMethod.cs

@@ -346,7 +346,7 @@ namespace Microsoft.ClearScript
             {
                 try
                 {
-                    var rawResult = TypeHelpers.BindToMember(candidates, bindFlags, args, bindArgs);
+                    var rawResult = TypeHelpers.BindToMember(this, candidates, bindFlags, args, bindArgs);
                     if (rawResult != null)
                     {
                         return MethodBindResult.Create(name, bindFlags, rawResult, hostTarget, args);
@@ -494,12 +494,12 @@ namespace Microsoft.ClearScript
 
             public override bool IsPreferredMethod(HostItem hostItem, string name)
             {
-                return !method.IsBlockedFromScript(hostItem.DefaultAccess) && (method.GetScriptName() == name);
+                return IsUnblockedMethod(hostItem) && (method.GetScriptName(hostItem) == name);
             }
 
             public override bool IsUnblockedMethod(HostItem hostItem)
             {
-                return !method.IsBlockedFromScript(hostItem.DefaultAccess);
+                return !method.IsBlockedFromScript(hostItem, hostItem.DefaultAccess);
             }
 
             public override object Invoke(HostItem hostItem)
@@ -509,7 +509,7 @@ namespace Microsoft.ClearScript
                     hostItem.Engine.CheckReflection();
                 }
 
-                return InvokeHelpers.InvokeMethod(hostItem, method, hostTarget.InvokeTarget, args, method.GetScriptMemberFlags());
+                return InvokeHelpers.InvokeMethod(hostItem, method, hostTarget.InvokeTarget, args, method.GetScriptMemberFlags(hostItem));
             }
 
             #endregion

ClearScript/HostItem.cs

@@ -362,12 +362,16 @@ namespace Microsoft.ClearScript
             set => targetMemberData.TargetInvocability = value;
         }
 
+        private CustomAttributeLoader CurrentCustomAttributeLoader => Engine.CustomAttributeLoader;
+
         private Type CurrentAccessContext => Flags.HasFlag(HostItemFlags.PrivateAccess) ? Target.Type : Engine.AccessContext;
 
         private ScriptAccess CurrentDefaultAccess => Engine.DefaultAccess;
 
         private HostTargetFlags CurrentTargetFlags => Target.GetFlags(this);
 
+        private CustomAttributeLoader CachedCustomAttributeLoader => (targetMemberData is HostTargetMemberDataWithContext targetMemberDataWithContext) ? targetMemberDataWithContext.CustomAttributeLoader : CurrentCustomAttributeLoader;
+
         private Type CachedAccessContext => (targetMemberData is HostTargetMemberDataWithContext targetMemberDataWithContext) ? targetMemberDataWithContext.AccessContext : CurrentAccessContext;
 
         private ScriptAccess CachedDefaultAccess
@@ -562,7 +566,7 @@ namespace Microsoft.ClearScript
 
         private void BindTargetMemberData()
         {
-            if ((targetMemberData == null) || (AccessContext != CurrentAccessContext) || (DefaultAccess != CurrentDefaultAccess) || (TargetFlags != CurrentTargetFlags))
+            if ((targetMemberData == null) || (CustomAttributeLoader != CurrentCustomAttributeLoader) || (AccessContext != CurrentAccessContext) || (DefaultAccess != CurrentDefaultAccess) || (TargetFlags != CurrentTargetFlags))
             {
                 if (Target is HostMethod)
                 {
@@ -590,13 +594,13 @@ namespace Microsoft.ClearScript
                     if ((TargetDynamic == null) && (TargetPropertyBag == null) && (TargetList == null) && (TargetDynamicMetaObject == null))
                     {
                         // host objects without dynamic members can share their member data
-                        targetMemberData = Engine.GetSharedHostObjectMemberData(hostObject, CurrentAccessContext, CurrentDefaultAccess, CurrentTargetFlags);
+                        targetMemberData = Engine.GetSharedHostObjectMemberData(hostObject, CurrentCustomAttributeLoader, CurrentAccessContext, CurrentDefaultAccess, CurrentTargetFlags);
                         return;
                     }
                 }
 
                 // all other targets use unique member data
-                targetMemberData = new HostTargetMemberDataWithContext(CurrentAccessContext, CurrentDefaultAccess, CurrentTargetFlags);
+                targetMemberData = new HostTargetMemberDataWithContext(CurrentCustomAttributeLoader, CurrentAccessContext, CurrentDefaultAccess, CurrentTargetFlags);
             }
         }
 
@@ -614,7 +618,7 @@ namespace Microsoft.ClearScript
             if (TypeEventNames == null)
             {
                 var localEvents = Target.Type.GetScriptableEvents(this, GetCommonBindFlags());
-                TypeEventNames = localEvents.Select(eventInfo => eventInfo.GetScriptName()).ToArray();
+                TypeEventNames = localEvents.Select(eventInfo => eventInfo.GetScriptName(this)).ToArray();
             }
 
             return TypeEventNames;
@@ -625,7 +629,7 @@ namespace Microsoft.ClearScript
             if (TypeFieldNames == null)
             {
                 var localFields = Target.Type.GetScriptableFields(this, GetCommonBindFlags());
-                TypeFieldNames = localFields.Select(field => field.GetScriptName()).ToArray();
+                TypeFieldNames = localFields.Select(field => field.GetScriptName(this)).ToArray();
             }
 
             return TypeFieldNames;
@@ -636,7 +640,7 @@ namespace Microsoft.ClearScript
             if (TypeMethodNames == null)
             {
                 var localMethods = Target.Type.GetScriptableMethods(this, GetMethodBindFlags());
-                TypeMethodNames = localMethods.Select(method => method.GetScriptName()).ToArray();
+                TypeMethodNames = localMethods.Select(method => method.GetScriptName(this)).ToArray();
             }
 
             return TypeMethodNames;
@@ -647,7 +651,7 @@ namespace Microsoft.ClearScript
             if (TypePropertyNames == null)
             {
                 var localProperties = Target.Type.GetScriptableProperties(this, GetCommonBindFlags());
-                TypePropertyNames = localProperties.Select(property => property.GetScriptName()).ToArray();
+                TypePropertyNames = localProperties.Select(property => property.GetScriptName(this)).ToArray();
             }
 
             return TypePropertyNames;
@@ -1600,33 +1604,31 @@ namespace Microsoft.ClearScript
             }
 
             var getMethod = property.GetMethod;
-            if ((getMethod == null) || !getMethod.IsAccessible(this) || getMethod.IsBlockedFromScript(property.GetScriptAccess(DefaultAccess), false))
+            if ((getMethod == null) || !getMethod.IsAccessible(this) || getMethod.IsBlockedFromScript(this, property.GetScriptAccess(this, DefaultAccess), false))
             {
                 throw new UnauthorizedAccessException("The property get method is unavailable or inaccessible");
             }
 
-            var result = GetHostPropertyWorker(property, getMethod, args);
             Engine.CachePropertyGetBindResult(signature, property);
-            return result;
+            return GetHostPropertyWorker(property, getMethod, args);
         }
 
         private object GetHostPropertyWorker(PropertyInfo property, MethodInfo getMethod, object[] args)
         {
-            return InvokeHelpers.InvokeMethod(this, getMethod, Target.InvokeTarget, args, property.GetScriptMemberFlags());
+            return InvokeHelpers.InvokeMethod(this, getMethod, Target.InvokeTarget, args, property.GetScriptMemberFlags(this));
         }
 
         private object GetHostField(BindSignature signature, FieldInfo field, out bool isCacheable)
         {
-            var result = GetHostFieldWorker(field, out isCacheable);
             Engine.CachePropertyGetBindResult(signature, field);
-            return result;
+            return GetHostFieldWorker(field, out isCacheable);
         }
 
         private object GetHostFieldWorker(FieldInfo field, out bool isCacheable)
         {
             var result = field.GetValue(Target.InvokeTarget);
             isCacheable = (TargetDynamicMetaObject == null) && (field.IsLiteral || field.IsInitOnly);
-            return Engine.PrepareResult(result, field.FieldType, field.GetScriptMemberFlags(), false);
+            return Engine.PrepareResult(result, field.FieldType, field.GetScriptMemberFlags(this), false);
         }
 
         private object SetHostProperty(string name, BindingFlags invokeFlags, object[] args, object[] bindArgs)
@@ -1752,21 +1754,20 @@ namespace Microsoft.ClearScript
 
         private object SetHostProperty(BindSignature signature, PropertyInfo property, object[] args, object[] bindArgs)
         {
-            var scriptAccess = property.GetScriptAccess(DefaultAccess);
+            var scriptAccess = property.GetScriptAccess(this, DefaultAccess);
             if (scriptAccess == ScriptAccess.ReadOnly)
             {
                 throw new UnauthorizedAccessException("The property is read-only");
             }
 
             var setMethod = property.SetMethod;
-            if ((setMethod == null) || !setMethod.IsAccessible(this) || setMethod.IsBlockedFromScript(scriptAccess, false))
+            if ((setMethod == null) || !setMethod.IsAccessible(this) || setMethod.IsBlockedFromScript(this, scriptAccess, false))
             {
                 throw new UnauthorizedAccessException("The property set method is unavailable or inaccessible");
             }
 
-            var result = SetHostPropertyWorker(property, setMethod, args, bindArgs);
             Engine.CachePropertySetBindResult(signature, property);
-            return result;
+            return SetHostPropertyWorker(property, setMethod, args, bindArgs);
         }
 
         private object SetHostPropertyWorker(PropertyInfo property, MethodInfo setMethod, object[] args, object[] bindArgs)
@@ -1810,7 +1811,7 @@ namespace Microsoft.ClearScript
             if (property.PropertyType.IsAssignableFromValue(ref value))
             {
                 args[args.Length - 1] = value;
-                InvokeHelpers.InvokeMethod(this, setMethod, Target.InvokeTarget, args, property.GetScriptMemberFlags());
+                InvokeHelpers.InvokeMethod(this, setMethod, Target.InvokeTarget, args, property.GetScriptMemberFlags(this));
                 return value;
             }
 
@@ -1821,7 +1822,7 @@ namespace Microsoft.ClearScript
             if ((setParams.Length >= args.Length) && (setParams[args.Length - 1].ParameterType.IsAssignableFromValue(ref value)))
             {
                 args[args.Length - 1] = value;
-                InvokeHelpers.InvokeMethod(this, setMethod, Target.InvokeTarget, args, property.GetScriptMemberFlags());
+                InvokeHelpers.InvokeMethod(this, setMethod, Target.InvokeTarget, args, property.GetScriptMemberFlags(this));
                 return value;
             }
 
@@ -1835,14 +1836,13 @@ namespace Microsoft.ClearScript
                 throw new InvalidOperationException("Invalid argument count");
             }
 
-            if (field.IsLiteral || field.IsInitOnly || field.IsReadOnlyForScript(DefaultAccess))
+            if (field.IsLiteral || field.IsInitOnly || field.IsReadOnlyForScript(this, DefaultAccess))
             {
                 throw new UnauthorizedAccessException("The field is read-only");
             }
 
-            var result = SetHostFieldWorker(field, args);
             Engine.CachePropertySetBindResult(signature, field);
-            return result;
+            return SetHostFieldWorker(field, args);
         }
 
         private object SetHostFieldWorker(FieldInfo field, object[] args)
@@ -2259,6 +2259,8 @@ namespace Microsoft.ClearScript
             return HostInvoke(() =>
             {
                 var index = 0;
+
+                // ReSharper disable once ConditionIsAlwaysTrueOrFalse
                 if (elements != null)
                 {
                     var maxCount = Math.Min(count, elements.Length);
@@ -2368,6 +2370,8 @@ namespace Microsoft.ClearScript
 
         #region IHostTargetContext implementation
 
+        public CustomAttributeLoader CustomAttributeLoader => CachedCustomAttributeLoader;
+
         public Type AccessContext => CachedAccessContext;
 
         public ScriptAccess DefaultAccess => CachedDefaultAccess;

ClearScript/HostSettings.cs

@@ -40,17 +40,14 @@ namespace Microsoft.ClearScript
         /// <summary>
         /// Gets or sets the custom attribute loader for ClearScript.
         /// </summary>
+        /// <remarks>
+        /// When not explicitly assigned to a non-<c>null</c> value, this property returns the
+        /// <see cref="CustomAttributeLoader.Default">default custom attribute loader.</see>.
+        /// </remarks>
         public static CustomAttributeLoader CustomAttributeLoader
         {
-            get => customAttributeLoader ?? DefaultCustomAttributeLoader;
+            get => customAttributeLoader ?? CustomAttributeLoader.Default;
-
+            set => customAttributeLoader = value;
-            set
-            {
-                customAttributeLoader = value;
-                CustomAttributes.ClearCache();
         }
     }
-
-        internal static readonly CustomAttributeLoader DefaultCustomAttributeLoader = new CustomAttributeLoader();
-    }
 }

ClearScript/HostTargetMemberData.cs

@@ -30,12 +30,14 @@ namespace Microsoft.ClearScript
 
     internal class HostTargetMemberDataWithContext : HostTargetMemberData
     {
+        public readonly CustomAttributeLoader CustomAttributeLoader;
         public readonly Type AccessContext;
         public readonly ScriptAccess DefaultAccess;
         public readonly HostTargetFlags TargetFlags;
 
-        public HostTargetMemberDataWithContext(Type accessContext, ScriptAccess defaultAccess, HostTargetFlags targetFlags)
+        public HostTargetMemberDataWithContext(CustomAttributeLoader customAttributeLoader, Type accessContext, ScriptAccess defaultAccess, HostTargetFlags targetFlags)
         {
+            CustomAttributeLoader = customAttributeLoader;
             AccessContext = accessContext;
             DefaultAccess = defaultAccess;
             TargetFlags = targetFlags;

ClearScript/HostTypeCollection.cs

@@ -91,7 +91,7 @@ namespace Microsoft.ClearScript
         public void AddAssembly(Assembly assembly)
         {
             MiscHelpers.VerifyNonNullArgument(assembly, nameof(assembly));
-            assembly.GetAllTypes().Where(type => type.IsImportable()).ForEach(AddType);
+            assembly.GetAllTypes().Where(type => type.IsImportable(null)).ForEach(AddType);
         }
 
         /// <summary>
@@ -113,7 +113,7 @@ namespace Microsoft.ClearScript
         {
             MiscHelpers.VerifyNonNullArgument(assembly, nameof(assembly));
             var activeFilter = filter ?? defaultFilter;
-            assembly.GetAllTypes().Where(type => type.IsImportable() && activeFilter(type)).ForEach(AddType);
+            assembly.GetAllTypes().Where(type => type.IsImportable(null) && activeFilter(type)).ForEach(AddType);
         }
 
         /// <summary>

ClearScript/IScriptEngine.cs

@@ -189,7 +189,7 @@ namespace Microsoft.ClearScript
         bool EnableAutoHostVariables { get; set; }
 
         /// <summary>
-        /// Gets or sets the engine's undefined import value.
+        /// Gets or sets the script engine's undefined import value.
         /// </summary>
         /// <remarks>
         /// Some script languages support one or more special non-<c>null</c> values that represent
@@ -200,7 +200,7 @@ namespace Microsoft.ClearScript
         object UndefinedImportValue { get; set; }
 
         /// <summary>
-        /// Gets or sets the engine's null export value.
+        /// Gets or sets the script engine's null export value.
         /// </summary>
         /// <remarks>
         /// <para>
@@ -221,7 +221,7 @@ namespace Microsoft.ClearScript
         object NullExportValue { get; set; }
 
         /// <summary>
-        /// Gets or sets the engine's void result export value.
+        /// Gets or sets the script engine's void result export value.
         /// </summary>
         /// <remarks>
         /// Some script languages expect every subroutine call to return a value. When script code
@@ -259,7 +259,7 @@ namespace Microsoft.ClearScript
         /// <remarks>
         /// The value of this property is an object that is bound to the script engine's root
         /// namespace. It allows you to access global script resources via the
-        /// <c><see cref="ScriptObject"/></c> class interface. Doing so is likely to perform better than
+        /// <c><see cref="ScriptObject"/></c> class interface. Doing so is likely to outperform
         /// dynamic access via <c><see cref="Script"/></c>.
         /// </remarks>
         ScriptObject Global { get; }
@@ -269,6 +269,20 @@ namespace Microsoft.ClearScript
         /// </summary>
         DocumentSettings DocumentSettings { get; set; }
 
+        /// <summary>
+        /// Gets or sets the script engine's custom attribute loader.
+        /// </summary>
+        /// <remarks>
+        /// By default, all script engines use the
+        /// <see cref="HostSettings.CustomAttributeLoader">global custom attribute loader</see>.
+        /// </remarks>
+        CustomAttributeLoader CustomAttributeLoader { get; set; }
+
+        /// <summary>
+        /// Allows the host to attach arbitrary data to the script engine.
+        /// </summary>
+        object HostData { get; set; }
+
         /// <summary>
         /// Exposes a host object to script code.
         /// </summary>

ClearScript/Properties/AssemblyInfo.Core.cs

@@ -18,15 +18,15 @@ using System.Runtime.InteropServices;
 [assembly: InternalsVisibleTo("ClearScriptTest")]
 
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("7.4.3")]
+[assembly: AssemblyVersion("7.4.4")]
-[assembly: AssemblyFileVersion("7.4.3")]
+[assembly: AssemblyFileVersion("7.4.4")]
-[assembly: AssemblyInformationalVersion("7.4.3")]
+[assembly: AssemblyInformationalVersion("7.4.4")]
 
 namespace Microsoft.ClearScript.Properties
 {
     internal static class ClearScriptVersion
     {
-        public const string Triad = "7.4.3";
+        public const string Triad = "7.4.4";
-        public const string Informational = "7.4.3";
+        public const string Informational = "7.4.4";
     }
 }

ClearScript/Properties/AssemblyInfo.V8.ICUData.cs

@@ -15,6 +15,6 @@ using System.Runtime.InteropServices;
 [assembly: InternalsVisibleTo("ClearScript.V8")]
 
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("7.4.3")]
+[assembly: AssemblyVersion("7.4.4")]
-[assembly: AssemblyFileVersion("7.4.3")]
+[assembly: AssemblyFileVersion("7.4.4")]
-[assembly: AssemblyInformationalVersion("7.4.3")]
+[assembly: AssemblyInformationalVersion("7.4.4")]

ClearScript/Properties/AssemblyInfo.V8.cs

@@ -15,6 +15,6 @@ using System.Runtime.InteropServices;
 [assembly: InternalsVisibleTo("ClearScriptTest")]
 
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("7.4.3")]
+[assembly: AssemblyVersion("7.4.4")]
-[assembly: AssemblyFileVersion("7.4.3")]
+[assembly: AssemblyFileVersion("7.4.4")]
-[assembly: AssemblyInformationalVersion("7.4.3")]
+[assembly: AssemblyInformationalVersion("7.4.4")]

ClearScript/Properties/AssemblyInfo.Windows.Core.cs

@@ -16,6 +16,6 @@ using System.Runtime.InteropServices;
 [assembly: InternalsVisibleTo("ClearScriptTest")]
 
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("7.4.3")]
+[assembly: AssemblyVersion("7.4.4")]
-[assembly: AssemblyFileVersion("7.4.3")]
+[assembly: AssemblyFileVersion("7.4.4")]
-[assembly: AssemblyInformationalVersion("7.4.3")]
+[assembly: AssemblyInformationalVersion("7.4.4")]

ClearScript/Properties/AssemblyInfo.Windows.cs

@@ -15,6 +15,6 @@ using System.Runtime.InteropServices;
 [assembly: InternalsVisibleTo("ClearScriptTest")]
 
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("7.4.3")]
+[assembly: AssemblyVersion("7.4.4")]
-[assembly: AssemblyFileVersion("7.4.3")]
+[assembly: AssemblyFileVersion("7.4.4")]
-[assembly: AssemblyInformationalVersion("7.4.3")]
+[assembly: AssemblyInformationalVersion("7.4.4")]

ClearScript/PropertyBag.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Diagnostics.CodeAnalysis;
@@ -33,8 +34,7 @@ namespace Microsoft.ClearScript
     {
         #region data
 
-        private readonly Dictionary<string, object> dictionary;
+        private readonly IDictionary<string, object> dictionary;
-        private readonly ICollection<KeyValuePair<string, object>> collection;
         private readonly bool isReadOnly;
         private readonly ConcurrentWeakSet<ScriptEngine> engineSet = new ConcurrentWeakSet<ScriptEngine>();
 
@@ -80,10 +80,15 @@ namespace Microsoft.ClearScript
         /// <param name="isReadOnly"><c>True</c> to make the <c><see cref="PropertyBag"/></c> read-only, <c>false</c> to make it writable.</param>
         /// <param name="comparer">The comparer to use for property names, or <c>null</c> to use the default string comparer.</param>
         public PropertyBag(bool isReadOnly, IEqualityComparer<string> comparer)
+            : this(isReadOnly, comparer, new Dictionary<string, object>(comparer ?? EqualityComparer<string>.Default))
         {
-            dictionary = new Dictionary<string, object>(comparer);
+        }
-            collection = dictionary;
+
+        internal PropertyBag(bool isReadOnly, IEqualityComparer<string> comparer, IDictionary<string, object> dictionary)
+        {
+            this.dictionary = dictionary;
             this.isReadOnly = isReadOnly;
+            Comparer = comparer;
         }
 
         #endregion
@@ -93,7 +98,7 @@ namespace Microsoft.ClearScript
         /// <summary>
         /// Gets the property name comparer for the <c><see cref="PropertyBag"/></c>.
         /// </summary>
-        public IEqualityComparer<string> Comparer => dictionary.Comparer;
+        public IEqualityComparer<string> Comparer { get; }
 
         /// <summary>
         /// Sets a property value without checking whether the <c><see cref="PropertyBag"/></c> is read-only.
@@ -217,20 +222,20 @@ namespace Microsoft.ClearScript
         [SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes", Justification = "This member is not expected to be re-implemented in derived classes.")]
         bool ICollection<KeyValuePair<string, object>>.Contains(KeyValuePair<string, object> item)
         {
-            return collection.Contains(item);
+            return dictionary.Contains(item);
         }
 
         [SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes", Justification = "This member is not expected to be re-implemented in derived classes.")]
         void ICollection<KeyValuePair<string, object>>.CopyTo(KeyValuePair<string, object>[] array, int arrayIndex)
         {
-            collection.CopyTo(array, arrayIndex);
+            dictionary.CopyTo(array, arrayIndex);
         }
 
         [SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes", Justification = "This member is not expected to be re-implemented in derived classes.")]
         bool ICollection<KeyValuePair<string, object>>.Remove(KeyValuePair<string, object> item)
         {
             CheckReadOnly();
-            if (collection.Remove(item))
+            if (dictionary.Remove(item))
             {
                 NotifyPropertyChanged(item.Key);
                 return true;
@@ -240,7 +245,7 @@ namespace Microsoft.ClearScript
         }
 
         [SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes", Justification = "This member is not expected to be re-implemented in derived classes.")]
-        int ICollection<KeyValuePair<string, object>>.Count => collection.Count;
+        int ICollection<KeyValuePair<string, object>>.Count => dictionary.Count;
 
         [SuppressMessage("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes", Justification = "This member is not expected to be re-implemented in derived classes.")]
         bool ICollection<KeyValuePair<string, object>>.IsReadOnly => isReadOnly;
@@ -345,4 +350,56 @@ namespace Microsoft.ClearScript
 
         #endregion
     }
+
+    /// <summary>
+    /// Provides a thread-safe <c><see cref="IPropertyBag"/></c> implementation.
+    /// </summary>
+    public class ConcurrentPropertyBag : PropertyBag
+    {
+        #region constructors
+
+        /// <summary>
+        /// Initializes a new writable <c><see cref="ConcurrentPropertyBag"/></c> with the default property name comparer.
+        /// </summary>
+        public ConcurrentPropertyBag()
+            : this(false)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new <c><see cref="ConcurrentPropertyBag"/></c> with the default property name comparer.
+        /// </summary>
+        /// <param name="isReadOnly"><c>True</c> to make the <c><see cref="PropertyBag"/></c> read-only, <c>false</c> to make it writable.</param>
+        /// <remarks>
+        /// The host can modify a read-only <c><see cref="ConcurrentPropertyBag"/></c> by calling
+        /// <c><see cref="PropertyBag.SetPropertyNoCheck">SetPropertyNoCheck</see></c>,
+        /// <c><see cref="PropertyBag.RemovePropertyNoCheck">RemovePropertyNoCheck</see></c>, or
+        /// <c><see cref="PropertyBag.ClearNoCheck">ClearNoCheck</see></c>.
+        /// </remarks>
+        public ConcurrentPropertyBag(bool isReadOnly)
+            : this(isReadOnly, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new writable <c><see cref="ConcurrentPropertyBag"/></c>.
+        /// </summary>
+        /// <param name="comparer">The comparer to use for property names, or <c>null</c> to use the default string comparer.</param>
+        public ConcurrentPropertyBag(IEqualityComparer<string> comparer)
+            : this(false, comparer)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new <c><see cref="ConcurrentPropertyBag"/></c>.
+        /// </summary>
+        /// <param name="isReadOnly"><c>True</c> to make the <c><see cref="ConcurrentPropertyBag"/></c> read-only, <c>false</c> to make it writable.</param>
+        /// <param name="comparer">The comparer to use for property names, or <c>null</c> to use the default string comparer.</param>
+        public ConcurrentPropertyBag(bool isReadOnly, IEqualityComparer<string> comparer)
+            : base(isReadOnly, comparer, new ConcurrentDictionary<string, object>(comparer ?? EqualityComparer<string>.Default))
+        {
+        }
+
+        #endregion
+    }
 }

ClearScript/ScriptEngine.cs

@@ -21,6 +21,7 @@ namespace Microsoft.ClearScript
         private ScriptAccess defaultAccess;
         private bool enforceAnonymousTypeAccess;
         private bool exposeHostObjectStaticMembers;
+        private CustomAttributeLoader customAttributeLoader;
 
         private DocumentSettings documentSettings;
         private readonly DocumentSettings defaultDocumentSettings = new DocumentSettings();
@@ -80,7 +81,7 @@ namespace Microsoft.ClearScript
         /// <inheritdoc/>
         public abstract string FileNameExtension { get; }
 
-        /// <inheritdoc cref="ScriptEngine" />
+        /// <inheritdoc cref="IScriptEngine.AccessContext" />
         public Type AccessContext
         {
             get => accessContext;
@@ -92,7 +93,7 @@ namespace Microsoft.ClearScript
             }
         }
 
-        /// <inheritdoc cref="ScriptEngine" />
+        /// <inheritdoc cref="IScriptEngine.DefaultAccess" />
         public ScriptAccess DefaultAccess
         {
             get => defaultAccess;
@@ -203,6 +204,21 @@ namespace Microsoft.ClearScript
             set => documentSettings = value;
         }
 
+        /// <inheritdoc cref="IScriptEngine.CustomAttributeLoader" />
+        public CustomAttributeLoader CustomAttributeLoader
+        {
+            get => customAttributeLoader;
+
+            set
+            {
+                customAttributeLoader = value;
+                OnAccessSettingsChanged();
+            }
+        }
+
+        /// <inheritdoc/>
+        public object HostData { get; set; }
+
         /// <inheritdoc/>
         public void AddHostObject(string itemName, object target)
         {
@@ -760,7 +776,7 @@ namespace Microsoft.ClearScript
         {
             if (extensionMethodTable != emptyExtensionMethodTable)
             {
-                if (extensionMethodTable.ProcessType(type, this))
+                if (extensionMethodTable.ProcessType(this, type))
                 {
                     ClearMethodBindCache();
                 }
@@ -773,7 +789,7 @@ namespace Microsoft.ClearScript
         {
             if (extensionMethodTable != emptyExtensionMethodTable)
             {
-                extensionMethodTable.RebuildSummary();
+                extensionMethodTable.RebuildSummary(this);
             }
         }
 
@@ -785,7 +801,7 @@ namespace Microsoft.ClearScript
 
         internal void CacheConstructorBindResult(BindSignature signature, ConstructorInfo result)
         {
-            constructorBindCache.Add(signature, result);
+            constructorBindCache[signature] = result;
         }
 
         internal bool TryGetCachedConstructorBindResult(BindSignature signature, out ConstructorInfo result)
@@ -806,7 +822,7 @@ namespace Microsoft.ClearScript
 
         internal void CacheMethodBindResult(BindSignature signature, object result)
         {
-            methodBindCache.Add(signature, result);
+            methodBindCache[signature] = result;
         }
 
         internal bool TryGetCachedMethodBindResult(BindSignature signature, out object result)
@@ -828,7 +844,7 @@ namespace Microsoft.ClearScript
 
         internal void CachePropertyGetBindResult(BindSignature signature, MemberInfo property)
         {
-            propertyGetBindCache.Add(signature, property);
+            propertyGetBindCache[signature] = property;
         }
 
         internal bool TryGetCachedPropertyGetBindResult(BindSignature signature, out MemberInfo property)
@@ -838,7 +854,7 @@ namespace Microsoft.ClearScript
 
         internal void CachePropertySetBindResult(BindSignature signature, MemberInfo property)
         {
-            propertySetBindCache.Add(signature, property);
+            propertySetBindCache[signature] = property;
         }
 
         internal bool TryGetCachedPropertySetBindResult(BindSignature signature, out MemberInfo property)
@@ -1013,7 +1029,7 @@ namespace Microsoft.ClearScript
 
         private readonly ConditionalWeakTable<Type, List<WeakReference>> sharedHostObjectMemberDataCache = new ConditionalWeakTable<Type, List<WeakReference>>();
 
-        internal HostTargetMemberData GetSharedHostObjectMemberData(HostObject target, Type targetAccessContext, ScriptAccess targetDefaultAccess, HostTargetFlags targetFlags)
+        internal HostTargetMemberData GetSharedHostObjectMemberData(HostObject target, CustomAttributeLoader targetCustomAttributeLoader, Type targetAccessContext, ScriptAccess targetDefaultAccess, HostTargetFlags targetFlags)
         {
             var cacheEntry = sharedHostObjectMemberDataCache.GetOrCreateValue(target.Type);
 
@@ -1029,7 +1045,7 @@ namespace Microsoft.ClearScript
                 }
                 else
                 {
-                    if ((memberData.AccessContext == targetAccessContext) && (memberData.DefaultAccess == targetDefaultAccess) && (memberData.TargetFlags == targetFlags))
+                    if ((memberData.CustomAttributeLoader == targetCustomAttributeLoader) && (memberData.AccessContext == targetAccessContext) && (memberData.DefaultAccess == targetDefaultAccess) && (memberData.TargetFlags == targetFlags))
                     {
                         return memberData;
                     }
@@ -1053,7 +1069,7 @@ namespace Microsoft.ClearScript
                 }
             }
 
-            var newMemberData = new HostTargetMemberDataWithContext(targetAccessContext, targetDefaultAccess, targetFlags);
+            var newMemberData = new HostTargetMemberDataWithContext(targetCustomAttributeLoader, targetAccessContext, targetDefaultAccess, targetFlags);
             cacheEntry.Add(new WeakReference(newMemberData));
             return newMemberData;
         }

ClearScript/Util/AssemblyHelpers.cs

@@ -74,22 +74,22 @@ namespace Microsoft.ClearScript.Util
             return null;
         }
 
-        public static T GetOrLoadCustomAttribute<T>(this Assembly assembly, bool inherit = true) where T : Attribute
+        public static T GetOrLoadCustomAttribute<T>(this Assembly assembly, IHostContext context, bool inherit = true) where T : Attribute
         {
-            return CustomAttributes.GetOrLoad<T>(assembly, inherit).SingleOrDefault();
+            return CustomAttributes.GetOrLoad<T>(context, assembly, inherit).SingleOrDefault();
         }
 
-        public static IEnumerable<T> GetOrLoadCustomAttributes<T>(this Assembly assembly, bool inherit = true) where T : Attribute
+        public static IEnumerable<T> GetOrLoadCustomAttributes<T>(this Assembly assembly, IHostContext context, bool inherit = true) where T : Attribute
         {
-            return CustomAttributes.GetOrLoad<T>(assembly, inherit);
+            return CustomAttributes.GetOrLoad<T>(context, assembly, inherit);
         }
 
-        public static bool HasCustomAttributes<T>(this Assembly assembly, bool inherit = true) where T : Attribute
+        public static bool HasCustomAttributes<T>(this Assembly assembly, IHostContext context, bool inherit = true) where T : Attribute
         {
-            return CustomAttributes.Has<T>(assembly, inherit);
+            return CustomAttributes.Has<T>(context, assembly, inherit);
         }
 
-        public static bool IsFriendOf(this Assembly thisAssembly, Assembly thatAssembly)
+        public static bool IsFriendOf(this Assembly thisAssembly, IHostContext context, Assembly thatAssembly)
         {
             if (thatAssembly == thisAssembly)
             {
@@ -97,7 +97,7 @@ namespace Microsoft.ClearScript.Util
             }
 
             var thisName = thisAssembly.GetName();
-            foreach (var attribute in thatAssembly.GetOrLoadCustomAttributes<InternalsVisibleToAttribute>(false))
+            foreach (var attribute in thatAssembly.GetOrLoadCustomAttributes<InternalsVisibleToAttribute>(context, false))
             {
                 var thatName = new AssemblyName(attribute.AssemblyName);
                 if (AssemblyName.ReferenceMatchesDefinition(thatName, thisName))

ClearScript/Util/IHostContext.cs

@@ -7,6 +7,7 @@ namespace Microsoft.ClearScript.Util
 {
     internal interface IHostContext
     {
+        CustomAttributeLoader CustomAttributeLoader { get; }
         ScriptEngine Engine { get; }
         Type AccessContext { get; }
         ScriptAccess DefaultAccess { get; }

ClearScript/Util/InvokeHelpers.cs

@@ -83,7 +83,7 @@ namespace Microsoft.ClearScript.Util
             for (var index = 0; index < parameters.Length; index++)
             {
                 var param = parameters[index];
-                if (CustomAttributes.Has<ParamArrayAttribute>(param, false))
+                if (CustomAttributes.Has<ParamArrayAttribute>(context, param, false))
                 {
                     if ((index != (args.Length - 1)) || !param.ParameterType.IsInstanceOfType(args[index]))
                     {

ClearScript/Util/MemberHelpers.cs

@@ -13,27 +13,27 @@ namespace Microsoft.ClearScript.Util
     {
         public static bool IsScriptable(this EventInfo eventInfo, IHostContext context)
         {
-            return !eventInfo.IsSpecialName && !eventInfo.IsExplicitImplementation() && eventInfo.IsAccessible(context) && !eventInfo.IsBlockedFromScript(context.DefaultAccess);
+            return !eventInfo.IsSpecialName && !eventInfo.IsExplicitImplementation() && eventInfo.IsAccessible(context) && !eventInfo.IsBlockedFromScript(context, context.DefaultAccess);
         }
 
         public static bool IsScriptable(this FieldInfo field, IHostContext context)
         {
-            return !field.IsSpecialName && field.IsAccessible(context) && !field.IsBlockedFromScript(context.DefaultAccess);
+            return !field.IsSpecialName && field.IsAccessible(context) && !field.IsBlockedFromScript(context, context.DefaultAccess);
         }
 
         public static bool IsScriptable(this MethodInfo method, IHostContext context)
         {
-            return !method.IsSpecialName && !method.IsExplicitImplementation() && method.IsAccessible(context) && !method.IsBlockedFromScript(context.DefaultAccess);
+            return !method.IsSpecialName && !method.IsExplicitImplementation() && method.IsAccessible(context) && !method.IsBlockedFromScript(context, context.DefaultAccess);
         }
 
         public static bool IsScriptable(this PropertyInfo property, IHostContext context)
         {
-            return !property.IsSpecialName && !property.IsExplicitImplementation() && property.IsAccessible(context) && !property.IsBlockedFromScript(context.DefaultAccess);
+            return !property.IsSpecialName && !property.IsExplicitImplementation() && property.IsAccessible(context) && !property.IsBlockedFromScript(context, context.DefaultAccess);
         }
 
         public static bool IsScriptable(this Type type, IHostContext context)
         {
-            return !type.IsSpecialName && type.IsAccessible(context) && !type.IsBlockedFromScript(context.DefaultAccess);
+            return !type.IsSpecialName && type.IsAccessible(context) && !type.IsBlockedFromScript(context, context.DefaultAccess);
         }
 
         public static bool IsAccessible(this EventInfo eventInfo, IHostContext context)
@@ -76,17 +76,17 @@ namespace Microsoft.ClearScript.Util
 
             if (access == FieldAttributes.Assembly)
             {
-                return accessContext.IsFriendOf(type);
+                return accessContext.IsFriendOf(context, type);
             }
 
             if (access == FieldAttributes.FamORAssem)
             {
-                return accessContext.IsFamilyOf(type) || accessContext.IsFriendOf(type);
+                return accessContext.IsFamilyOf(type) || accessContext.IsFriendOf(context, type);
             }
 
             if (access == FieldAttributes.FamANDAssem)
             {
-                return accessContext.IsFamilyOf(type) && accessContext.IsFriendOf(type);
+                return accessContext.IsFamilyOf(type) && accessContext.IsFriendOf(context, type);
             }
 
             return false;
@@ -127,17 +127,17 @@ namespace Microsoft.ClearScript.Util
 
             if (access == MethodAttributes.Assembly)
             {
-                return accessContext.IsFriendOf(type);
+                return accessContext.IsFriendOf(context, type);
             }
 
             if (access == MethodAttributes.FamORAssem)
             {
-                return accessContext.IsFamilyOf(type) || accessContext.IsFriendOf(type);
+                return accessContext.IsFamilyOf(type) || accessContext.IsFriendOf(context, type);
             }
 
             if (access == MethodAttributes.FamANDAssem)
             {
-                return accessContext.IsFamilyOf(type) && accessContext.IsFriendOf(type);
+                return accessContext.IsFamilyOf(type) && accessContext.IsFriendOf(context, type);
             }
 
             return false;
@@ -167,7 +167,7 @@ namespace Microsoft.ClearScript.Util
 
         public static bool IsAccessible(this Type type, IHostContext context)
         {
-            var visibility = (type.IsAnonymous() && !context.Engine.EnforceAnonymousTypeAccess) ? TypeAttributes.Public : type.Attributes & TypeAttributes.VisibilityMask;
+            var visibility = (type.IsAnonymous(context) && !context.Engine.EnforceAnonymousTypeAccess) ? TypeAttributes.Public : type.Attributes & TypeAttributes.VisibilityMask;
 
             if (visibility == TypeAttributes.Public)
             {
@@ -183,7 +183,7 @@ namespace Microsoft.ClearScript.Util
 
             if (visibility == TypeAttributes.NotPublic)
             {
-                return accessContext.IsFriendOf(type);
+                return accessContext.IsFriendOf(context, type);
             }
 
             type = type.DeclaringType;
@@ -210,41 +210,41 @@ namespace Microsoft.ClearScript.Util
 
             if (visibility == TypeAttributes.NestedAssembly)
             {
-                return accessContext.IsFriendOf(type);
+                return accessContext.IsFriendOf(context, type);
             }
 
             if (visibility == TypeAttributes.NestedFamORAssem)
             {
-                return accessContext.IsFamilyOf(type) || accessContext.IsFriendOf(type);
+                return accessContext.IsFamilyOf(type) || accessContext.IsFriendOf(context, type);
             }
 
             if (visibility == TypeAttributes.NestedFamANDAssem)
             {
-                return accessContext.IsFamilyOf(type) && accessContext.IsFriendOf(type);
+                return accessContext.IsFamilyOf(type) && accessContext.IsFriendOf(context, type);
             }
 
             return false;
         }
 
-        public static string GetScriptName(this MemberInfo member)
+        public static string GetScriptName(this MemberInfo member, IHostContext context)
         {
-            var attribute = member.GetOrLoadCustomAttribute<ScriptMemberAttribute>();
+            var attribute = member.GetOrLoadCustomAttribute<ScriptMemberAttribute>(context);
             return attribute?.Name ?? member.GetShortName();
         }
 
-        public static bool IsBlockedFromScript(this MemberInfo member, ScriptAccess defaultAccess, bool chain = true)
+        public static bool IsBlockedFromScript(this MemberInfo member, IHostContext context, ScriptAccess defaultAccess, bool chain = true)
         {
-            return member.GetScriptAccess(defaultAccess, chain) == ScriptAccess.None;
+            return member.GetScriptAccess(context, defaultAccess, chain) == ScriptAccess.None;
         }
 
-        public static bool IsReadOnlyForScript(this MemberInfo member, ScriptAccess defaultAccess)
+        public static bool IsReadOnlyForScript(this MemberInfo member, IHostContext context, ScriptAccess defaultAccess)
         {
-            return member.GetScriptAccess(defaultAccess) == ScriptAccess.ReadOnly;
+            return member.GetScriptAccess(context, defaultAccess) == ScriptAccess.ReadOnly;
         }
 
-        public static ScriptAccess GetScriptAccess(this MemberInfo member, ScriptAccess defaultValue, bool chain = true)
+        public static ScriptAccess GetScriptAccess(this MemberInfo member, IHostContext context, ScriptAccess defaultValue, bool chain = true)
         {
-            var attribute = member.GetOrLoadCustomAttribute<ScriptUsageAttribute>();
+            var attribute = member.GetOrLoadCustomAttribute<ScriptUsageAttribute>(context);
             if (attribute != null)
             {
                 return attribute.Access;
@@ -260,14 +260,14 @@ namespace Microsoft.ClearScript.Util
                     {
                         if (testType.IsNested)
                         {
-                            var nestedTypeAttribute = testType.GetOrLoadCustomAttribute<ScriptUsageAttribute>();
+                            var nestedTypeAttribute = testType.GetOrLoadCustomAttribute<ScriptUsageAttribute>(context);
                             if (nestedTypeAttribute != null)
                             {
                                 return nestedTypeAttribute.Access;
                             }
                         }
 
-                        var typeAttribute = testType.GetOrLoadCustomAttribute<DefaultScriptUsageAttribute>();
+                        var typeAttribute = testType.GetOrLoadCustomAttribute<DefaultScriptUsageAttribute>(context);
                         if (typeAttribute != null)
                         {
                             return typeAttribute.Access;
@@ -277,7 +277,7 @@ namespace Microsoft.ClearScript.Util
 
                     } while (testType != null);
 
-                    var assemblyAttribute = declaringType.Assembly.GetOrLoadCustomAttribute<DefaultScriptUsageAttribute>();
+                    var assemblyAttribute = declaringType.Assembly.GetOrLoadCustomAttribute<DefaultScriptUsageAttribute>(context);
                     if (assemblyAttribute != null)
                     {
                         return assemblyAttribute.Access;
@@ -288,20 +288,20 @@ namespace Microsoft.ClearScript.Util
             return defaultValue;
         }
 
-        public static bool IsRestrictedForScript(this MemberInfo member)
+        public static bool IsRestrictedForScript(this MemberInfo member, IHostContext context)
         {
-            return !member.GetScriptMemberFlags().HasFlag(ScriptMemberFlags.ExposeRuntimeType);
+            return !member.GetScriptMemberFlags(context).HasFlag(ScriptMemberFlags.ExposeRuntimeType);
         }
 
-        public static bool IsDispID(this MemberInfo member, int dispid)
+        public static bool IsDispID(this MemberInfo member, IHostContext context, int dispid)
         {
-            var attribute = member.GetOrLoadCustomAttribute<DispIdAttribute>();
+            var attribute = member.GetOrLoadCustomAttribute<DispIdAttribute>(context);
             return (attribute != null) && (attribute.Value == dispid);
         }
 
-        public static ScriptMemberFlags GetScriptMemberFlags(this MemberInfo member)
+        public static ScriptMemberFlags GetScriptMemberFlags(this MemberInfo member, IHostContext context)
         {
-            var attribute = member.GetOrLoadCustomAttribute<ScriptMemberAttribute>();
+            var attribute = member.GetOrLoadCustomAttribute<ScriptMemberAttribute>(context);
             return attribute?.Flags ?? ScriptMemberFlags.None;
         }
 
@@ -312,11 +312,11 @@ namespace Microsoft.ClearScript.Util
             return (index >= 0) ? name.Substring(index + 1) : name;
         }
 
-        public static T GetOrLoadCustomAttribute<T>(this MemberInfo member, bool inherit = true) where T : Attribute
+        public static T GetOrLoadCustomAttribute<T>(this MemberInfo member, IHostContext context, bool inherit = true) where T : Attribute
         {
             try
             {
-                return CustomAttributes.GetOrLoad<T>(member, inherit).SingleOrDefault();
+                return CustomAttributes.GetOrLoad<T>(context, member, inherit).SingleOrDefault();
             }
             catch (AmbiguousMatchException)
             {
@@ -325,21 +325,21 @@ namespace Microsoft.ClearScript.Util
                     // this affects SqlDataReader and is indicative of a .NET issue described here:
                     // http://connect.microsoft.com/VisualStudio/feedback/details/646399/attribute-isdefined-throws-ambiguousmatchexception-for-indexer-properties-and-inherited-attributes
 
-                    return CustomAttributes.GetOrLoad<T>(member, false).SingleOrDefault();
+                    return CustomAttributes.GetOrLoad<T>(context, member, false).SingleOrDefault();
                 }
 
                 throw;
             }
         }
 
-        public static IEnumerable<T> GetOrLoadCustomAttributes<T>(this MemberInfo member, bool inherit = true) where T : Attribute
+        public static IEnumerable<T> GetOrLoadCustomAttributes<T>(this MemberInfo member, IHostContext context, bool inherit = true) where T : Attribute
         {
-            return CustomAttributes.GetOrLoad<T>(member, inherit);
+            return CustomAttributes.GetOrLoad<T>(context, member, inherit);
         }
 
-        public static bool HasCustomAttributes<T>(this MemberInfo member, bool inherit = true) where T : Attribute
+        public static bool HasCustomAttributes<T>(this MemberInfo member, IHostContext context, bool inherit = true) where T : Attribute
         {
-            return CustomAttributes.Has<T>(member, inherit);
+            return CustomAttributes.Has<T>(context, member, inherit);
         }
 
         private static bool IsExplicitImplementation(this MemberInfo member)

ClearScript/Util/TypeHelpers.cs

@@ -67,19 +67,19 @@ namespace Microsoft.ClearScript.Util
             return !type.IsGenericParameter && !type.ContainsGenericParameters;
         }
 
-        public static bool IsCompilerGenerated(this Type type)
+        public static bool IsCompilerGenerated(this Type type, IHostContext context)
         {
-            return type.HasCustomAttributes<CompilerGeneratedAttribute>(false);
+            return type.HasCustomAttributes<CompilerGeneratedAttribute>(context, false);
         }
 
-        public static bool IsFlagsEnum(this Type type)
+        public static bool IsFlagsEnum(this Type type, IHostContext context)
         {
-            return type.IsEnum && type.HasCustomAttributes<FlagsAttribute>(false);
+            return type.IsEnum && type.HasCustomAttributes<FlagsAttribute>(context, false);
         }
 
-        public static bool IsImportable(this Type type)
+        public static bool IsImportable(this Type type, IHostContext context)
         {
-            if (!type.IsNested && !type.IsSpecialName && !type.IsCompilerGenerated())
+            if (!type.IsNested && !type.IsSpecialName && !type.IsCompilerGenerated(context))
             {
                 var locator = type.GetLocator();
                 return !importDenyList.Contains(locator) && IsValidLocator(locator);
@@ -88,7 +88,7 @@ namespace Microsoft.ClearScript.Util
             return false;
         }
 
-        public static bool IsAnonymous(this Type type)
+        public static bool IsAnonymous(this Type type, IHostContext context)
         {
             if (!type.IsGenericType)
             {
@@ -112,7 +112,7 @@ namespace Microsoft.ClearScript.Util
                 return false;
             }
 
-            if (!type.IsCompilerGenerated())
+            if (!type.IsCompilerGenerated(context))
             {
                 return false;
             }
@@ -222,9 +222,9 @@ namespace Microsoft.ClearScript.Util
             return numericConversions[(int)valueType.GetNumericType()].HasFlag(GetNumericTypes(type.GetNumericType()));
         }
 
-        public static bool HasExtensionMethods(this Type type)
+        public static bool HasExtensionMethods(this Type type, IHostContext context)
         {
-            return type.HasCustomAttributes<ExtensionAttribute>(false);
+            return type.HasCustomAttributes<ExtensionAttribute>(context, false);
         }
 
         public static bool EqualsOrDeclares(this Type type, Type thatType)
@@ -253,20 +253,20 @@ namespace Microsoft.ClearScript.Util
             return false;
         }
 
-        public static bool IsFriendOf(this Type type, Type thatType)
+        public static bool IsFriendOf(this Type type, IHostContext context, Type thatType)
         {
-            return type.Assembly.IsFriendOf(thatType.Assembly);
+            return type.Assembly.IsFriendOf(context, thatType.Assembly);
         }
 
-        public static bool IsCOMVisible(this Type type)
+        public static bool IsCOMVisible(this Type type, IHostContext context)
         {
-            var attribute = type.GetOrLoadCustomAttribute<ComVisibleAttribute>(false);
+            var attribute = type.GetOrLoadCustomAttribute<ComVisibleAttribute>(context, false);
             if (attribute != null)
             {
                 return attribute.Value;
             }
 
-            attribute = type.Assembly.GetOrLoadCustomAttribute<ComVisibleAttribute>(false);
+            attribute = type.Assembly.GetOrLoadCustomAttribute<ComVisibleAttribute>(context, false);
             if (attribute != null)
             {
                 return attribute.Value;
@@ -349,7 +349,7 @@ namespace Microsoft.ClearScript.Util
             {
             }
 
-            return type.GetScriptableEvents(context, bindFlags).FirstOrDefault(eventInfo => string.Equals(eventInfo.GetScriptName(), name, bindFlags.GetMemberNameComparison()));
+            return type.GetScriptableEvents(context, bindFlags).FirstOrDefault(eventInfo => string.Equals(eventInfo.GetScriptName(context), name, bindFlags.GetMemberNameComparison()));
         }
 
         public static IEnumerable<FieldInfo> GetScriptableFields(this Type type, IHostContext context, BindingFlags bindFlags)
@@ -360,12 +360,12 @@ namespace Microsoft.ClearScript.Util
         public static FieldInfo GetScriptableField(this Type type, IHostContext context, string name, BindingFlags bindFlags)
         {
             var candidate = type.GetField(name, bindFlags);
-            if ((candidate != null) && candidate.IsScriptable(context) && string.Equals(candidate.GetScriptName(), name, bindFlags.GetMemberNameComparison()))
+            if ((candidate != null) && candidate.IsScriptable(context) && string.Equals(candidate.GetScriptName(context), name, bindFlags.GetMemberNameComparison()))
             {
                 return candidate;
             }
 
-            return type.GetScriptableFields(context, bindFlags).FirstOrDefault(field => string.Equals(field.GetScriptName(), name, bindFlags.GetMemberNameComparison()));
+            return type.GetScriptableFields(context, bindFlags).FirstOrDefault(field => string.Equals(field.GetScriptName(context), name, bindFlags.GetMemberNameComparison()));
         }
 
         public static IEnumerable<MethodInfo> GetScriptableMethods(this Type type, IHostContext context, BindingFlags bindFlags)
@@ -382,7 +382,7 @@ namespace Microsoft.ClearScript.Util
 
         public static IEnumerable<MethodInfo> GetScriptableMethods(this Type type, IHostContext context, string name, BindingFlags bindFlags)
         {
-            return type.GetScriptableMethods(context, bindFlags).Where(method => string.Equals(method.GetScriptName(), name, bindFlags.GetMemberNameComparison()));
+            return type.GetScriptableMethods(context, bindFlags).Where(method => string.Equals(method.GetScriptName(context), name, bindFlags.GetMemberNameComparison()));
         }
 
         public static IEnumerable<PropertyInfo> GetScriptableProperties(this Type type, IHostContext context, BindingFlags bindFlags)
@@ -411,12 +411,12 @@ namespace Microsoft.ClearScript.Util
             }
 
             var defaultMembers = type.GetDefaultMembers();
-            return properties.Where(property => property.IsScriptable(context) && (defaultMembers.Contains(property) || property.IsDispID(SpecialDispIDs.Default)));
+            return properties.Where(property => property.IsScriptable(context) && (defaultMembers.Contains(property) || property.IsDispID(context, SpecialDispIDs.Default)));
         }
 
         public static IEnumerable<PropertyInfo> GetScriptableProperties(this Type type, IHostContext context, string name, BindingFlags bindFlags)
         {
-            return type.GetScriptableProperties(context, bindFlags).Where(property => string.Equals(property.GetScriptName(), name, bindFlags.GetMemberNameComparison()));
+            return type.GetScriptableProperties(context, bindFlags).Where(property => string.Equals(property.GetScriptName(context), name, bindFlags.GetMemberNameComparison()));
         }
 
         public static PropertyInfo GetScriptableProperty(this Type type, IHostContext context, string name, BindingFlags bindFlags)
@@ -430,7 +430,7 @@ namespace Microsoft.ClearScript.Util
             try
             {
                 // ReSharper disable once RedundantEnumerableCastCall
-                return candidates.OfType<PropertyInfo>().SingleOrDefault(property => (property.GetIndexParameters().Length < 1) && property.IsScriptable(context) && string.Equals(property.GetScriptName(), name, bindFlags.GetMemberNameComparison()));
+                return candidates.OfType<PropertyInfo>().SingleOrDefault(property => (property.GetIndexParameters().Length < 1) && property.IsScriptable(context) && string.Equals(property.GetScriptName(context), name, bindFlags.GetMemberNameComparison()));
             }
             catch (InvalidOperationException exception)
             {
@@ -456,13 +456,13 @@ namespace Microsoft.ClearScript.Util
             }
 
             var candidates = type.GetScriptableProperties(context, name, bindFlags).Distinct(PropertySignatureComparer.Instance).ToArray();
-            return BindToMember(candidates, bindFlags, args, bindArgs);
+            return BindToMember(context, candidates, bindFlags, args, bindArgs);
         }
 
         public static PropertyInfo GetScriptableDefaultProperty(this Type type, IHostContext context, BindingFlags bindFlags, object[] args, object[] bindArgs)
         {
             var candidates = type.GetScriptableDefaultProperties(context, bindFlags).Distinct(PropertySignatureComparer.Instance).ToArray();
-            return BindToMember(candidates, bindFlags, args, bindArgs);
+            return BindToMember(context, candidates, bindFlags, args, bindArgs);
         }
 
         public static IEnumerable<Type> GetScriptableNestedTypes(this Type type, IHostContext context, BindingFlags bindFlags)
@@ -506,13 +506,13 @@ namespace Microsoft.ClearScript.Util
                 return type.CreateInstance();
             }
 
-            var candidates = constructors.Where(testConstructor => testConstructor.IsAccessible(context) && !testConstructor.IsBlockedFromScript(context.DefaultAccess)).ToArray();
+            var candidates = constructors.Where(testConstructor => testConstructor.IsAccessible(context) && !testConstructor.IsBlockedFromScript(context, context.DefaultAccess)).ToArray();
             if (candidates.Length < 1)
             {
                 throw new MissingMethodException(MiscHelpers.FormatInvariant("Type '{0}' has no constructor that matches the specified arguments", type.GetFullFriendlyName()));
             }
 
-            var constructor = BindToMember(candidates, flags, args, bindArgs);
+            var constructor = BindToMember(context, candidates, flags, args, bindArgs);
             if (constructor == null)
             {
                 throw new MissingMethodException(MiscHelpers.FormatInvariant("Type '{0}' has no constructor that matches the specified arguments", type.GetFullFriendlyName()));
@@ -553,26 +553,26 @@ namespace Microsoft.ClearScript.Util
             return type;
         }
 
-        public static T BindToMember<T>(T[] candidates, BindingFlags bindFlags, object[] args, object[] bindArgs) where T : MethodBase
+        public static T BindToMember<T>(IHostContext context, T[] candidates, BindingFlags bindFlags, object[] args, object[] bindArgs) where T : MethodBase
         {
             T result = null;
 
             if (candidates.Length > 0)
             {
-                var bindCandidates = GetBindCandidates(candidates, args, bindArgs.Select(GetBindArgType).ToArray()).ToArray();
+                var bindCandidates = GetBindCandidates(context, candidates, args, bindArgs.Select(GetBindArgType).ToArray()).ToArray();
                 result = SelectBindCandidate(bindCandidates);
             }
 
             return result;
         }
 
-        public static PropertyInfo BindToMember(PropertyInfo[] candidates, BindingFlags bindFlags, object[] args, object[] bindArgs)
+        public static PropertyInfo BindToMember(IHostContext context, PropertyInfo[] candidates, BindingFlags bindFlags, object[] args, object[] bindArgs)
         {
             PropertyInfo result = null;
 
             if (candidates.Length > 0)
             {
-                var bindCandidates = GetBindCandidates(candidates, args, bindArgs.Select(GetBindArgType).ToArray()).ToArray();
+                var bindCandidates = GetBindCandidates(context, candidates, args, bindArgs.Select(GetBindArgType).ToArray()).ToArray();
                 result = SelectBindCandidate(bindCandidates);
 
                 if (result == null)
@@ -718,7 +718,7 @@ namespace Microsoft.ClearScript.Util
             try
             {
                 // ReSharper disable once RedundantEnumerableCastCall
-                return candidates.OfType<EventInfo>().SingleOrDefault(eventInfo => eventInfo.IsScriptable(context) && string.Equals(eventInfo.GetScriptName(), name, bindFlags.GetMemberNameComparison()));
+                return candidates.OfType<EventInfo>().SingleOrDefault(eventInfo => eventInfo.IsScriptable(context) && string.Equals(eventInfo.GetScriptName(context), name, bindFlags.GetMemberNameComparison()));
             }
             catch (InvalidOperationException exception)
             {
@@ -1001,21 +1001,21 @@ namespace Microsoft.ClearScript.Util
             return null;
         }
 
-        private static IEnumerable<BindCandidate<T>> GetBindCandidates<T>(T[] candidates, object[] args, Type[] argTypes) where T : MethodBase
+        private static IEnumerable<BindCandidate<T>> GetBindCandidates<T>(IHostContext context, T[] candidates, object[] args, Type[] argTypes) where T : MethodBase
         {
-            return GetBindCandidates(candidates, candidate => candidate.GetParameters(), args, argTypes);
+            return GetBindCandidates(context, candidates, candidate => candidate.GetParameters(), args, argTypes);
         }
 
-        private static IEnumerable<BindCandidate<PropertyInfo>> GetBindCandidates(PropertyInfo[] candidates, object[] args, Type[] argTypes)
+        private static IEnumerable<BindCandidate<PropertyInfo>> GetBindCandidates(IHostContext context, PropertyInfo[] candidates, object[] args, Type[] argTypes)
         {
-            return GetBindCandidates(candidates, candidate => candidate.GetIndexParameters(), args, argTypes);
+            return GetBindCandidates(context, candidates, candidate => candidate.GetIndexParameters(), args, argTypes);
         }
 
-        private static IEnumerable<BindCandidate<T>> GetBindCandidates<T>(T[] candidates, Func<T, ParameterInfo[]> getParameters, object[] args, Type[] argTypes) where T : MemberInfo
+        private static IEnumerable<BindCandidate<T>> GetBindCandidates<T>(IHostContext context, T[] candidates, Func<T, ParameterInfo[]> getParameters, object[] args, Type[] argTypes) where T : MemberInfo
         {
             foreach (var candidate in candidates)
             {
-                if (MiscHelpers.Try(out var bindCandidate, () => BindCandidate<T>.TryCreateInstance(candidate, getParameters(candidate), args, argTypes)) && (bindCandidate != null))
+                if (MiscHelpers.Try(out var bindCandidate, () => BindCandidate<T>.TryCreateInstance(context, candidate, getParameters(candidate), args, argTypes)) && (bindCandidate != null))
                 {
                     yield return bindCandidate;
                 }
@@ -1326,7 +1326,7 @@ namespace Microsoft.ClearScript.Util
                 return TypeNode.TryGetUpcastCount(Candidate.DeclaringType, other.Candidate.DeclaringType, out _) ? -1 : 1;
             }
 
-            public static BindCandidate<T> TryCreateInstance(T candidate, ParameterInfo[] parameters, object[] args, Type[] argTypes)
+            public static BindCandidate<T> TryCreateInstance(IHostContext context, T candidate, ParameterInfo[] parameters, object[] args, Type[] argTypes)
             {
                 var defaultArgCount = 0;
                 var paramArray = false;
@@ -1343,7 +1343,7 @@ namespace Microsoft.ClearScript.Util
                     var param = parameters[paramIndex];
                     paramType = param.ParameterType;
 
-                    if ((paramIndex == (parameters.Length - 1)) && paramType.IsArray && CustomAttributes.Has<ParamArrayAttribute>(param, false))
+                    if ((paramIndex == (parameters.Length - 1)) && paramType.IsArray && CustomAttributes.Has<ParamArrayAttribute>(context, param, false))
                     {
                         paramArray = true;
                         break;

ClearScript/V8/V8ScriptEngine.cs

@@ -1792,17 +1792,19 @@ namespace Microsoft.ClearScript.V8
 
         object IJavaScriptEngine.CreatePromiseForTask<T>(Task<T> task)
         {
+            var scheduler = (engineFlags.HasFlag(V8ScriptEngineFlags.UseSynchronizationContexts) && MiscHelpers.Try(out var contextScheduler, TaskScheduler.FromCurrentSynchronizationContext)) ? contextScheduler : TaskScheduler.Current;
             return CreatePromise((resolve, reject) =>
             {
-                task.ContinueWith(_ => CompletePromise(task, resolve, reject), TaskContinuationOptions.ExecuteSynchronously);
+                task.ContinueWith(_ => CompletePromise(task, resolve, reject), CancellationToken.None, TaskContinuationOptions.ExecuteSynchronously, scheduler);
             });
         }
 
         object IJavaScriptEngine.CreatePromiseForTask(Task task)
         {
+            var scheduler = (engineFlags.HasFlag(V8ScriptEngineFlags.UseSynchronizationContexts) && MiscHelpers.Try(out var contextScheduler, TaskScheduler.FromCurrentSynchronizationContext)) ? contextScheduler : TaskScheduler.Current;
             return CreatePromise((resolve, reject) =>
             {
-                task.ContinueWith(_ => CompletePromise(task, resolve, reject), TaskContinuationOptions.ExecuteSynchronously);
+                task.ContinueWith(_ => CompletePromise(task, resolve, reject), CancellationToken.None, TaskContinuationOptions.ExecuteSynchronously, scheduler);
             });
         }
 
@@ -1814,10 +1816,17 @@ namespace Microsoft.ClearScript.V8
             }
 
             var source = new TaskCompletionSource<object>();
+            var context = engineFlags.HasFlag(V8ScriptEngineFlags.UseSynchronizationContexts) ? SynchronizationContext.Current : null;
+
+            Action<object> setResultWorker = result => source.SetResult(result);
+            var setResult = (context == null) ? setResultWorker : result => context.Post(_ => setResultWorker(result), null);
+
+            Action<Exception> setExceptionWorker = exception => source.SetException(exception);
+            var setException = (context == null) ? setExceptionWorker : exception => context.Post(_ => setExceptionWorker(exception), null);
 
             Action<object> onResolved = result =>
             {
-                source.SetResult(result);
+                setResult(result);
             };
 
             Action<object> onRejected = error =>
@@ -1829,7 +1838,7 @@ namespace Microsoft.ClearScript.V8
                 }
                 catch (Exception exception)
                 {
-                    source.SetException(exception);
+                    setException(exception);
                 }
             };
 

ClearScript/V8/V8ScriptEngineFlags.cs

@@ -122,6 +122,13 @@ namespace Microsoft.ClearScript.V8
         /// accessible to script code via the <c>Error</c> object's <c>hostException</c> property.
         /// This option suppresses that behavior.
         /// </summary>
-        HideHostExceptions = 0x00001000
+        HideHostExceptions = 0x00001000,
+
+        /// <summary>
+        /// Specifies that support for synchronization contexts is to be enabled for task-promise
+        /// interoperability. This option is ignored if
+        /// <c><see cref="EnableTaskPromiseConversion"/></c> is not specified.
+        /// </summary>
+        UseSynchronizationContexts = 0x00002000
     }
 }

ClearScript/Windows/Core/WindowsScriptEngine.cs

@@ -252,7 +252,7 @@ namespace Microsoft.ClearScript.Windows.Core
             }
         }
 
-        private static bool GetDirectAccessItem(object item, out object directAccessItem)
+        private bool GetDirectAccessItem(object item, out object directAccessItem)
         {
             while (true)
             {
@@ -278,7 +278,7 @@ namespace Microsoft.ClearScript.Windows.Core
                     continue;
                 }
 
-                if ((item != null) && (item.GetType().IsCOMObject || item.GetType().IsCOMVisible()))
+                if ((item != null) && (item.GetType().IsCOMObject || item.GetType().IsCOMVisible(this)))
                 {
                     directAccessItem = item;
                     return true;

ClearScript/Windows/Core/WindowsScriptItem.cs

@@ -93,7 +93,7 @@ namespace Microsoft.ClearScript.Windows.Core
                 else if (HResult.GetFacility(result) == HResult.FACILITY_CONTROL)
                 {
                     // These exceptions often have awful messages that include COM error codes.
-                    // The engine itself may be able to provide a better message.
+                    // The script engine itself may be able to provide a better message.
 
                     if (engine.RuntimeErrorMap.TryGetValue(HResult.GetCode(result), out var runtimeErrorMessage) && (runtimeErrorMessage != exception.Message))
                     {

ClearScript/Windows/DispatcherSyncInvoker.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
 using System;
@@ -9,12 +9,7 @@ namespace Microsoft.ClearScript.Windows
 {
     internal sealed class DispatcherSyncInvoker : ISyncInvoker
     {
-        public DispatcherSyncInvoker()
+        public Dispatcher Dispatcher { get; } = Dispatcher.CurrentDispatcher;
-        {
-            Dispatcher = Dispatcher.CurrentDispatcher;
-        }
-
-        public Dispatcher Dispatcher { get; }
 
         public bool CheckAccess()
         {

ClearScriptBenchmarks/Properties/AssemblyInfo.cs

@@ -11,6 +11,6 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyCopyright("(c) Microsoft Corporation")]
 
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("7.4.3")]
+[assembly: AssemblyVersion("7.4.4")]
-[assembly: AssemblyFileVersion("7.4.3")]
+[assembly: AssemblyFileVersion("7.4.4")]
-[assembly: AssemblyInformationalVersion("7.4.3")]
+[assembly: AssemblyInformationalVersion("7.4.4")]

ClearScriptConsole/Properties/AssemblyInfo.cs

@@ -11,6 +11,6 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyCopyright("(c) Microsoft Corporation")]
 
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("7.4.3")]
+[assembly: AssemblyVersion("7.4.4")]
-[assembly: AssemblyFileVersion("7.4.3")]
+[assembly: AssemblyFileVersion("7.4.4")]
-[assembly: AssemblyInformationalVersion("7.4.3")]
+[assembly: AssemblyInformationalVersion("7.4.4")]

ClearScriptTest/BugFixTest.cs

@@ -1837,6 +1837,32 @@ namespace Microsoft.ClearScript.Test
 
     #endif // !NET6_0_OR_GREATER
 
+        [TestMethod, TestCategory("BugFix")]
+        public void BugFix_PropertyAccessorRecursion()
+        {
+            engine.Script.test = new PropertyAccessorRecursionTest { Engine = engine };
+            var result = engine.Evaluate(@"
+                (function() {
+                    let count = 0;
+                    globalThis.onGetProperty = function () {
+                        if (count++ < 5) {
+                            const value = test.Property;
+                        }
+                    };
+                    globalThis.onSetProperty = function () {
+                        if (test.Property == 123) {
+                            test.Property = 456;
+                        } else {
+                            test.Property = 789;
+                        }
+                    };
+                })();
+                test.Property = 123;
+                test.Property
+            ");
+            Assert.AreEqual(789, result);
+        }
+
         // ReSharper restore InconsistentNaming
 
         #endregion
@@ -2382,6 +2408,30 @@ namespace Microsoft.ClearScript.Test
             }
         }
 
+        public class PropertyAccessorRecursionTest
+        {
+            public ScriptEngine Engine;
+            private int property;
+
+            public int Property
+            {
+                get
+                {
+                    Engine.Script.onGetProperty();
+                    return property;
+                }
+
+                set
+                {
+                    if (value != property)
+                    {
+                        property = value;
+                        Engine.Script.onSetProperty();
+                    }
+                }
+            }
+        }
+
         #endregion
     }
 }

ClearScriptTest/HostTypeCollectionTest.cs

@@ -86,7 +86,7 @@ namespace Microsoft.ClearScript.Test
         {
             var assemblies = assemblyNames.Select(assemblyName => Assembly.Load(AssemblyTable.GetFullAssemblyName(assemblyName)));
             var activeFilter = filter ?? defaultFilter;
-            return assemblies.SelectMany(assembly => assembly.GetAllTypes().Where(type => type.IsImportable() && activeFilter(type)));
+            return assemblies.SelectMany(assembly => assembly.GetAllTypes().Where(type => type.IsImportable(null) && activeFilter(type)));
         }
 
         private static IEnumerable<HostType> GetLeafNodes(PropertyBag container)

ClearScriptTest/JScriptCoreEngineTest.cs

@@ -657,7 +657,7 @@ namespace Microsoft.ClearScript.Test
         [TestMethod, TestCategory("JScriptCoreEngine")]
         public void JScriptCoreEngine_CollectGarbage()
         {
-            engine.Execute(@"x = []; for (i = 0; i < 1024 * 1024; i++) { x.push(x); }");
+            engine.Execute("x = []; for (i = 0; i < 1024 * 1024; i++) { x.push(x); }");
             engine.CollectGarbage(true);
             // can't test JScript GC effectiveness
         }
@@ -2954,6 +2954,22 @@ namespace Microsoft.ClearScript.Test
             }
         }
 
+        [TestMethod, TestCategory("JScriptCoreEngine")]
+        public void JScriptCoreEngine_CustomAttributeLoader_Private()
+        {
+            using (var otherEngine = new JScriptEngine(NullSyncInvoker.Instance))
+            {
+                engine.CustomAttributeLoader = new CamelCaseAttributeLoader();
+                TestCamelCaseMemberBinding();
+
+                using (Scope.Create(() => engine, originalEngine => engine = originalEngine))
+                {
+                    engine = otherEngine;
+                    TestUtil.AssertException<InvalidCastException>(TestCamelCaseMemberBinding);
+                }
+            }
+        }
+
         [TestMethod, TestCategory("JScriptCoreEngine")]
         public void JScriptCoreEngine_ScriptObjectIdentity()
         {

ClearScriptTest/JScriptEngineTest.cs

@@ -656,7 +656,7 @@ namespace Microsoft.ClearScript.Test
         [TestMethod, TestCategory("JScriptEngine")]
         public void JScriptEngine_CollectGarbage()
         {
-            engine.Execute(@"x = []; for (i = 0; i < 1024 * 1024; i++) { x.push(x); }");
+            engine.Execute("x = []; for (i = 0; i < 1024 * 1024; i++) { x.push(x); }");
             engine.CollectGarbage(true);
             // can't test JScript GC effectiveness
         }
@@ -3014,6 +3014,22 @@ namespace Microsoft.ClearScript.Test
             }
         }
 
+        [TestMethod, TestCategory("JScriptEngine")]
+        public void JScriptEngine_CustomAttributeLoader_Private()
+        {
+            using (var otherEngine = new JScriptEngine())
+            {
+                engine.CustomAttributeLoader = new CamelCaseAttributeLoader();
+                TestCamelCaseMemberBinding();
+
+                using (Scope.Create(() => engine, originalEngine => engine = originalEngine))
+                {
+                    engine = otherEngine;
+                    TestUtil.AssertException<InvalidCastException>(TestCamelCaseMemberBinding);
+                }
+            }
+        }
+
         [TestMethod, TestCategory("JScriptEngine")]
         public void JScriptEngine_ScriptObjectIdentity()
         {

ClearScriptTest/Properties/AssemblyInfo.cs

@@ -11,6 +11,6 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyCopyright("(c) Microsoft Corporation")]
 
 [assembly: ComVisible(false)]
-[assembly: AssemblyVersion("7.4.3")]
+[assembly: AssemblyVersion("7.4.4")]
-[assembly: AssemblyFileVersion("7.4.3")]
+[assembly: AssemblyFileVersion("7.4.4")]
-[assembly: AssemblyInformationalVersion("7.4.3")]
+[assembly: AssemblyInformationalVersion("7.4.4")]

ClearScriptTest/PropertyBagTest.Unix.cs

@@ -21,8 +21,8 @@ namespace Microsoft.ClearScript.Test
 
             Action innerTest = () =>
             {
-                // The Visual Studio 2013 debugging stack fails to release the engine properly,
+                // The Visual Studio 2013 debugging stack fails to release the script engine
-                // resulting in test failure. Visual Studio 2012 does not have this bug.
+                // properly, resulting in test failure. Visual Studio 2012 does not have this bug.
 
                 using (var scriptEngine = new V8ScriptEngine())
                 {
@@ -45,8 +45,8 @@ namespace Microsoft.ClearScript.Test
             var innerBag = new PropertyBag();
             Action innerTest = () =>
             {
-                // The Visual Studio 2013 debugging stack fails to release the engine properly,
+                // The Visual Studio 2013 debugging stack fails to release the script engine
-                // resulting in test failure. Visual Studio 2012 does not have this bug.
+                // properly, resulting in test failure. Visual Studio 2012 does not have this bug.
 
                 using (var scriptEngine = new V8ScriptEngine())
                 {

ClearScriptTest/PropertyBagTest.Windows.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
 using System;
@@ -25,8 +25,8 @@ namespace Microsoft.ClearScript.Test
 
             Action innerTest = () =>
             {
-                // The Visual Studio 2013 debugging stack fails to release the engine properly,
+                // The Visual Studio 2013 debugging stack fails to release the script engine
-                // resulting in test failure. Visual Studio 2012 does not have this bug.
+                // properly, resulting in test failure. Visual Studio 2012 does not have this bug.
 
                 using (var scriptEngine = new VBScriptEngine())
                 {
@@ -49,8 +49,8 @@ namespace Microsoft.ClearScript.Test
             var innerBag = new PropertyBag();
             Action innerTest = () =>
             {
-                // The Visual Studio 2013 debugging stack fails to release the engine properly,
+                // The Visual Studio 2013 debugging stack fails to release the script engine
-                // resulting in test failure. Visual Studio 2012 does not have this bug.
+                // properly, resulting in test failure. Visual Studio 2012 does not have this bug.
 
                 using (var scriptEngine = new VBScriptEngine())
                 {
@@ -170,6 +170,70 @@ namespace Microsoft.ClearScript.Test
             stopEvent.Dispose();
         }
 
+        [TestMethod, TestCategory("PropertyBag")]
+        public void PropertyBag_Concurrent_JScript()
+        {
+            var bag = new ConcurrentPropertyBag();
+            engine.AddHostObject("bag", bag);
+
+            var threadCount = Environment.Is64BitProcess ? 512 : 16;
+            var engineCount = 0;
+
+            var startEvent = new ManualResetEventSlim(false);
+            var checkpointEvent = new ManualResetEventSlim(false);
+            var continueEvent = new ManualResetEventSlim(false);
+            var stopEvent = new ManualResetEventSlim(false);
+
+            ParameterizedThreadStart body = arg =>
+            {
+                // ReSharper disable AccessToDisposedClosure
+
+                var index = (int)arg;
+                startEvent.Wait();
+
+                var scriptEngine = new Windows.Core.JScriptEngine(Windows.Core.NullSyncInvoker.Instance);
+
+                scriptEngine.AddHostObject("bag", bag);
+                scriptEngine.Global["index"] = index;
+
+                scriptEngine.Execute("bag['foo' + index] = index");
+                Assert.AreEqual(index, scriptEngine.Evaluate("bag['foo' + index]"));
+
+                if (Interlocked.Increment(ref engineCount) == threadCount)
+                {
+                    checkpointEvent.Set();
+                }
+
+                continueEvent.Wait();
+
+                scriptEngine.Dispose();
+                if (Interlocked.Decrement(ref engineCount) == 0)
+                {
+                    stopEvent.Set();
+                }
+
+                // ReSharper restore AccessToDisposedClosure
+            };
+
+            var threads = Enumerable.Range(0, threadCount).Select(index => new Thread(body)).ToArray();
+            threads.ForEach((thread, index) => thread.Start(index));
+
+            startEvent.Set();
+            checkpointEvent.Wait();
+            Assert.AreEqual(threadCount + 1, bag.EngineCount);
+
+            continueEvent.Set();
+            stopEvent.Wait();
+            GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced);
+            Assert.AreEqual(1, bag.EngineCount);
+
+            Array.ForEach(threads, thread => thread.Join());
+            startEvent.Dispose();
+            checkpointEvent.Dispose();
+            continueEvent.Dispose();
+            stopEvent.Dispose();
+        }
+
         // ReSharper restore InconsistentNaming
 
         #endregion

ClearScriptTest/PropertyBagTest.cs

@@ -3,6 +3,9 @@
 
 using System;
 using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Threading;
+using Microsoft.ClearScript.Util;
 using Microsoft.ClearScript.V8;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 
@@ -196,6 +199,75 @@ namespace Microsoft.ClearScript.Test
             Assert.AreSame(Undefined.Value, engine.Evaluate("bag.bar"));
         }
 
+        [TestMethod, TestCategory("PropertyBag")]
+        public void PropertyBag_Concurrent()
+        {
+            var bag = new ConcurrentPropertyBag();
+            engine.AddHostObject("bag", bag);
+
+            // 32-bit V8 starts failing requests to create new contexts rather quickly. This is
+            // because each V8 isolate requires (among other things) a 32MB address space
+            // reservation. 64-bit V8 reserves much larger blocks but benefits from the enormous
+            // available address space.
+
+            var threadCount = Environment.Is64BitProcess ? 512 : 16;
+            var engineCount = 0;
+
+            var startEvent = new ManualResetEventSlim(false);
+            var checkpointEvent = new ManualResetEventSlim(false);
+            var continueEvent = new ManualResetEventSlim(false);
+            var stopEvent = new ManualResetEventSlim(false);
+
+            ParameterizedThreadStart body = arg =>
+            {
+                // ReSharper disable AccessToDisposedClosure
+
+                var index = (int)arg;
+                startEvent.Wait();
+
+                var scriptEngine = new V8ScriptEngine();
+
+                scriptEngine.AddHostObject("bag", bag);
+                scriptEngine.Global["index"] = index;
+
+                scriptEngine.Execute("bag['foo' + index] = index");
+                Assert.AreEqual(index, scriptEngine.Evaluate("bag['foo' + index]"));
+
+                if (Interlocked.Increment(ref engineCount) == threadCount)
+                {
+                    checkpointEvent.Set();
+                }
+
+                continueEvent.Wait();
+
+                scriptEngine.Dispose();
+                if (Interlocked.Decrement(ref engineCount) == 0)
+                {
+                    stopEvent.Set();
+                }
+
+                // ReSharper restore AccessToDisposedClosure
+            };
+
+            var threads = Enumerable.Range(0, threadCount).Select(index => new Thread(body)).ToArray();
+            threads.ForEach((thread, index) => thread.Start(index));
+
+            startEvent.Set();
+            checkpointEvent.Wait();
+            Assert.AreEqual(threadCount + 1, bag.EngineCount);
+
+            continueEvent.Set();
+            stopEvent.Wait();
+            GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced);
+            Assert.AreEqual(1, bag.EngineCount);
+
+            Array.ForEach(threads, thread => thread.Join());
+            startEvent.Dispose();
+            checkpointEvent.Dispose();
+            continueEvent.Dispose();
+            stopEvent.Dispose();
+        }
+
         // ReSharper restore InconsistentNaming
 
         #endregion

ClearScriptTest/V8ScriptEngineTest.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Collections.Specialized;
 using System.Diagnostics.CodeAnalysis;
@@ -4486,6 +4487,22 @@ namespace Microsoft.ClearScript.Test
             }
         }
 
+        [TestMethod, TestCategory("V8ScriptEngine")]
+        public void V8ScriptEngine_CustomAttributeLoader_Private()
+        {
+            using (var otherEngine = new V8ScriptEngine())
+            {
+                engine.CustomAttributeLoader = new CamelCaseAttributeLoader();
+                TestCamelCaseMemberBinding();
+
+                using (Scope.Create(() => engine, originalEngine => engine = originalEngine))
+                {
+                    engine = otherEngine;
+                    TestUtil.AssertException<InvalidCastException>(TestCamelCaseMemberBinding);
+                }
+            }
+        }
+
         [TestMethod, TestCategory("V8ScriptEngine")]
         public void V8ScriptEngine_StringifyEnhancements()
         {
@@ -5166,6 +5183,63 @@ namespace Microsoft.ClearScript.Test
             }
         }
 
+
+        [TestMethod, TestCategory("V8ScriptEngine")]
+        public void V8ScriptEngine_UseSynchronizationContexts()
+        {
+            Func<SingleThreadSynchronizationContext, Task<bool>> doWork = context => Task<bool>.Factory.StartNew(() =>
+            {
+                Thread.Sleep(100);
+                return context.OnThread;
+            });
+
+            var managedResults = SingleThreadSynchronizationContext.RunTask(async context =>
+            {
+                var results = new List<bool> { context.OnThread };
+                results.Add(await doWork(context));
+                results.Add(context.OnThread);
+                return results;
+            });
+
+            Assert.IsTrue(managedResults.SequenceEqual(new[] { true, false, true }));
+
+            // ReSharper disable AccessToDisposedClosure
+
+            engine.Dispose();
+            engine = new V8ScriptEngine(V8ScriptEngineFlags.EnableDebugging | V8ScriptEngineFlags.EnableTaskPromiseConversion);
+            engine.Script.doWork = doWork;
+            var scriptResults = (IList<object>)SingleThreadSynchronizationContext.RunTask(async context =>
+            {
+                engine.Script.context = context;
+                return await (Task<object>)engine.Evaluate(@"(async function () {
+                    const results = [context.OnThread];
+                    results.push(await doWork(context));
+                    results.push(context.OnThread);
+                    return results;
+                })()");
+            });
+
+            Assert.IsTrue(scriptResults.SequenceEqual(new object[] { true, false, false }));
+
+            engine.Dispose();
+            engine = new V8ScriptEngine(V8ScriptEngineFlags.EnableDebugging | V8ScriptEngineFlags.EnableTaskPromiseConversion | V8ScriptEngineFlags.UseSynchronizationContexts);
+            engine.Script.doWork = doWork;
+            scriptResults = (IList<object>)SingleThreadSynchronizationContext.RunTask(async context =>
+            {
+                engine.Script.context = context;
+                return await (Task<object>)engine.Evaluate(@"(async function () {
+                    const results = [context.OnThread];
+                    results.push(await doWork(context));
+                    results.push(context.OnThread);
+                    return results;
+                })()");
+            });
+
+            Assert.IsTrue(scriptResults.SequenceEqual(new object[] { true, false, true }));
+
+            // ReSharper restore AccessToDisposedClosure
+        }
+
         // ReSharper restore InconsistentNaming
 
         #endregion
@@ -5252,7 +5326,7 @@ namespace Microsoft.ClearScript.Test
 
             builder.AppendLine();
             AppendCpuProfileTestSequence(builder, 4, MiscHelpers.CreateSeededRandom(), new List<int>());
-            builder.Append(@"                })()");
+            builder.Append("                })()");
             builder.AppendLine();
 
             return builder.ToString();
@@ -5533,6 +5607,47 @@ namespace Microsoft.ClearScript.Test
             }
         }
 
+        public class SingleThreadSynchronizationContext : SynchronizationContext
+        {
+            private readonly BlockingCollection<(SendOrPostCallback, object)> queue = new BlockingCollection<(SendOrPostCallback, object)>();
+            private readonly Thread thread;
+
+            private SingleThreadSynchronizationContext()
+            {
+                thread = new Thread(RunLoop);
+                thread.Start();
+            }
+
+            public bool OnThread => Thread.CurrentThread == thread;
+
+            public static T RunTask<T>(Func<SingleThreadSynchronizationContext, Task<T>> createTask)
+            {
+                var context = new SingleThreadSynchronizationContext();
+
+                T result = default;
+                var doneEvent = new ManualResetEventSlim();
+
+                context.Post(_ => createTask(context).ContinueWith(task => { result = task.Result; doneEvent.Set(); }), null);
+                doneEvent.Wait();
+
+                context.queue.CompleteAdding();
+                context.thread.Join();
+
+                return result;
+            }
+
+            public override void Post(SendOrPostCallback callback, object state) => queue.Add((callback, state));
+
+            private void RunLoop()
+            {
+                SetSynchronizationContext(this);
+                foreach (var (callback, state) in queue.GetConsumingEnumerable())
+                {
+                    callback(state);
+                }
+            }
+        }
+
         #endregion
     }
 }

ClearScriptV8/V8Context.h

@@ -27,7 +27,8 @@ public:
         EnableValueTaskPromiseConversion = 0x00000200,
         UseCaseInsensitiveMemberBinding = 0x00000400,
         EnableStringifyEnhancements = 0x00000800,
-        HideHostExceptions = 0x00001000
+        HideHostExceptions = 0x00001000,
+        UseSynchronizationContexts = 0x00002000
     };
 
     struct Options final

NetCore/ClearScript.Core/ClearScript.Core.csproj

@@ -43,9 +43,9 @@
         <Compile Include="..\..\ClearScript\ByRefArg.cs" Link="ByRefArg.cs" />
         <Compile Include="..\..\ClearScript\CanonicalRefTable.cs" Link="CanonicalRefTable.cs" />
         <Compile Include="..\..\ClearScript\ContinuationCallback.cs" Link="ContinuationCallback.cs" />
+        <Compile Include="..\..\ClearScript\CustomAttributeCache.cs" Link="CustomAttributeCache.cs" />
         <Compile Include="..\..\ClearScript\CustomAttributeLoader.cs" Link="CustomAttributeLoader.cs" />
         <Compile Include="..\..\ClearScript\CustomAttributes.cs" Link="CustomAttributes.cs" />
-        <Compile Include="..\..\ClearScript\CustomAttributes.NetStandard.cs" Link="CustomAttributes.NetStandard.cs" />
         <Compile Include="..\..\ClearScript\DefaultDocumentLoader.cs" Link="DefaultDocumentLoader.cs" />
         <Compile Include="..\..\ClearScript\DefaultScriptUsageAttribute.cs" Link="DefaultScriptUsageAttribute.cs" />
         <Compile Include="..\..\ClearScript\DelegateFactory.cs" Link="DelegateFactory.cs" />

NetFramework/ClearScript.Core/ClearScript.Core.csproj

@@ -40,9 +40,9 @@
         <Compile Include="..\..\ClearScript\ByRefArg.cs" Link="ByRefArg.cs" />
         <Compile Include="..\..\ClearScript\CanonicalRefTable.cs" Link="CanonicalRefTable.cs" />
         <Compile Include="..\..\ClearScript\ContinuationCallback.cs" Link="ContinuationCallback.cs" />
+        <Compile Include="..\..\ClearScript\CustomAttributeCache.cs" Link="CustomAttributeCache.cs" />
         <Compile Include="..\..\ClearScript\CustomAttributeLoader.cs" Link="CustomAttributeLoader.cs" />
         <Compile Include="..\..\ClearScript\CustomAttributes.cs" Link="CustomAttributes.cs" />
-        <Compile Include="..\..\ClearScript\CustomAttributes.NetFramework.cs" Link="CustomAttributes.NetFramework.cs" />
         <Compile Include="..\..\ClearScript\DefaultDocumentLoader.cs" Link="DefaultDocumentLoader.cs" />
         <Compile Include="..\..\ClearScript\DefaultScriptUsageAttribute.cs" Link="DefaultScriptUsageAttribute.cs" />
         <Compile Include="..\..\ClearScript\DelegateFactory.cs" Link="DelegateFactory.cs" />

NetStandard/ClearScript.Core/ClearScript.Core.csproj

@@ -42,9 +42,9 @@
         <Compile Include="..\..\ClearScript\ByRefArg.cs" Link="ByRefArg.cs" />
         <Compile Include="..\..\ClearScript\CanonicalRefTable.cs" Link="CanonicalRefTable.cs" />
         <Compile Include="..\..\ClearScript\ContinuationCallback.cs" Link="ContinuationCallback.cs" />
+        <Compile Include="..\..\ClearScript\CustomAttributeCache.cs" Link="CustomAttributeCache.cs" />
         <Compile Include="..\..\ClearScript\CustomAttributeLoader.cs" Link="CustomAttributeLoader.cs" />
         <Compile Include="..\..\ClearScript\CustomAttributes.cs" Link="CustomAttributes.cs" />
-        <Compile Include="..\..\ClearScript\CustomAttributes.NetStandard.cs" Link="CustomAttributes.NetStandard.cs" />
         <Compile Include="..\..\ClearScript\DefaultDocumentLoader.cs" Link="DefaultDocumentLoader.cs" />
         <Compile Include="..\..\ClearScript\DefaultScriptUsageAttribute.cs" Link="DefaultScriptUsageAttribute.cs" />
         <Compile Include="..\..\ClearScript\DelegateFactory.cs" Link="DelegateFactory.cs" />

UWP/ClearScript.Core/ClearScript.Core.csproj

@@ -66,9 +66,9 @@
     <Compile Include="..\..\ClearScript\ByRefArg.cs" Link="ByRefArg.cs" />
     <Compile Include="..\..\ClearScript\CanonicalRefTable.cs" Link="CanonicalRefTable.cs" />
     <Compile Include="..\..\ClearScript\ContinuationCallback.cs" Link="ContinuationCallback.cs" />
+    <Compile Include="..\..\ClearScript\CustomAttributeCache.cs" Link="CustomAttributeCache.cs" />
     <Compile Include="..\..\ClearScript\CustomAttributeLoader.cs" Link="CustomAttributeLoader.cs" />
     <Compile Include="..\..\ClearScript\CustomAttributes.cs" Link="CustomAttributes.cs" />
-    <Compile Include="..\..\ClearScript\CustomAttributes.NetStandard.cs" Link="CustomAttributes.NetStandard.cs" />
     <Compile Include="..\..\ClearScript\DefaultDocumentLoader.cs" Link="DefaultDocumentLoader.cs" />
     <Compile Include="..\..\ClearScript\DefaultScriptUsageAttribute.cs" Link="DefaultScriptUsageAttribute.cs" />
     <Compile Include="..\..\ClearScript\DelegateFactory.cs" Link="DelegateFactory.cs" />

Unix/V8Update.sh

@@ -1,8 +1,8 @@
 #!/bin/bash
 
-v8testedrev=11.6.189.18
+v8testedrev=11.8.172.15
 v8testedcommit=
-v8cherrypicks=
+v8cherrypicks=28a7e2d45fd620fa68fb0678a7246fc8e426d1cc
 v8linuxbuildcommit=3d9590754d5d23e62d15472c5baf6777ca59df20
 v8linuxclangcommit=184bc29dd86c3994a02b4f3feca125ffe785319c
 
@@ -174,6 +174,9 @@ if [[ $download == true ]]; then
     fi
     git apply --reject --ignore-whitespace ../../V8Patch.txt 2>apply-patch.log || fail
     if [[ $linux == true ]]; then
+        cd third_party/abseil-cpp || abort
+            git apply --reject --ignore-whitespace ../../../../AbseilCppPatch.txt 2>apply-patch.log || fail
+        cd ../..
         cd build || abort
         if [[ $v8linuxbuildcommit != "" ]]; then
             git reset --hard $v8linuxbuildcommit >resetBuild.log || fail
@@ -209,6 +212,12 @@ cd build/v8 || abort
 echo "Creating/updating patches ..."
 git diff --ignore-space-change --ignore-space-at-eol >V8Patch.txt 2>create-patch.log || fail
 
+if [[ $linux == true ]]; then
+    cd third_party/abseil-cpp || abort
+    git diff --ignore-space-change --ignore-space-at-eol >AbseilCppPatch.txt 2>create-patch.log || fail
+    cd ../..
+fi
+
 if [[ $linux == true ]]; then
     echo "Installing LKG sysroots ..."
     build/linux/sysroot_scripts/install-sysroot.py --arch=x64 >install-x64-sysroot.log || fail
@@ -225,6 +234,10 @@ cd ../..
 echo "Importing patches ..."
 cp build/v8/V8Patch.txt . || fail
 
+if [[ $linux == true ]]; then
+    cp build/v8/third_party/abseil-cpp/AbseilCppPatch.txt . || fail
+fi
+
 echo "Importing ICU data ..."
 cp build/v8/out/$cpu/$mode/icudtl.dat . || fail
 

V8/AbseilCppPatch.txt

@@ -0,0 +1,12 @@
+diff --git a/absl.gni b/absl.gni
+index cf8a39e..06c0af0 100644
+--- a/absl.gni
++++ b/absl.gni
+@@ -25,7 +25,6 @@ template("absl_source_set") {
+     configs -= [ "//build/config/compiler:chromium_code" ]
+     configs += [
+       "//build/config/compiler:no_chromium_code",
+-      "//build/config/compiler:prevent_unsafe_narrowing",
+       "//third_party/abseil-cpp:absl_default_cflags_cc",
+       "//third_party/abseil-cpp:absl_define_config",
+     ]

V8/V8Patch.txt

@@ -1,5 +1,5 @@
 diff --git a/BUILD.gn b/BUILD.gn
-index c13cf053a8..07eca38dd3 100644
+index dd97c4f922c..b847c2d4cd4 100644
 --- a/BUILD.gn
 +++ b/BUILD.gn
 @@ -8,7 +8,6 @@ import("//build/config/coverage/coverage.gni")
@@ -10,20 +10,20 @@ index c13cf053a8..07eca38dd3 100644
  import("//build/config/sanitizers/sanitizers.gni")
  import("//build_overrides/build.gni")
  
-@@ -1179,7 +1178,7 @@ config("toolchain") {
+@@ -1228,7 +1227,7 @@ config("toolchain") {
    visibility = [ "./*" ]
  
    defines = []
 -  cflags = []
-+  cflags = [ "-D_SILENCE_CXX20_OLD_SHARED_PTR_ATOMIC_SUPPORT_DEPRECATION_WARNING", "-Wno-invalid-offsetof" ]
++  cflags = [ "-D_SILENCE_CXX20_OLD_SHARED_PTR_ATOMIC_SUPPORT_DEPRECATION_WARNING" ]
    ldflags = []
  
    if (v8_current_cpu == "arm") {
 diff --git a/gni/v8.gni b/gni/v8.gni
-index 6a9f9c6610..efd40329f8 100644
+index e2505eea24e..977b8776db2 100644
 --- a/gni/v8.gni
 +++ b/gni/v8.gni
-@@ -100,7 +100,7 @@ declare_args() {
+@@ -103,7 +103,7 @@ declare_args() {
    cppgc_is_standalone = false
  
    # Enable object names in cppgc for profiling purposes.
@@ -33,12 +33,12 @@ index 6a9f9c6610..efd40329f8 100644
    # Enable young generation in cppgc.
    cppgc_enable_young_generation = false
 diff --git a/include/libplatform/libplatform.h b/include/libplatform/libplatform.h
-index 9ec60c04f9..a5c268db93 100644
+index 6a34f432410..88a81ab4c40 100644
 --- a/include/libplatform/libplatform.h
 +++ b/include/libplatform/libplatform.h
-@@ -43,6 +43,8 @@ V8_PLATFORM_EXPORT std::unique_ptr<v8::Platform> NewDefaultPlatform(
+@@ -49,6 +49,8 @@ V8_PLATFORM_EXPORT std::unique_ptr<v8::Platform> NewDefaultPlatform(
-         InProcessStackDumping::kDisabled,
+     std::unique_ptr<v8::TracingController> tracing_controller = {},
-     std::unique_ptr<v8::TracingController> tracing_controller = {});
+     PriorityMode priority_mode = PriorityMode::kDontApply);
  
 +V8_PLATFORM_EXPORT std::unique_ptr<v8::PageAllocator> NewDefaultPageAllocator();
 +
@@ -46,7 +46,7 @@ index 9ec60c04f9..a5c268db93 100644
   * The same as NewDefaultPlatform but disables the worker thread pool.
   * It must be used with the --single-threaded V8 flag.
 diff --git a/include/v8-initialization.h b/include/v8-initialization.h
-index d3e35d6ec5..56b3faaa79 100644
+index d3e35d6ec5f..56b3faaa791 100644
 --- a/include/v8-initialization.h
 +++ b/include/v8-initialization.h
 @@ -136,6 +136,7 @@ class V8_EXPORT V8 {
@@ -68,10 +68,10 @@ index d3e35d6ec5..56b3faaa79 100644
    V8();
  
 diff --git a/include/v8-platform.h b/include/v8-platform.h
-index 9811c6e7bf..3d34d1697a 100644
+index 0d82f4b990a..16d717a2cef 100644
 --- a/include/v8-platform.h
 +++ b/include/v8-platform.h
-@@ -1206,7 +1206,7 @@ class Platform {
+@@ -1232,7 +1232,7 @@ class Platform {
     * required.
     */
    virtual int64_t CurrentClockTimeMilliseconds() {
@@ -81,7 +81,7 @@ index 9811c6e7bf..3d34d1697a 100644
  
    /**
 diff --git a/include/v8-template.h b/include/v8-template.h
-index 11296cd488..0f090446dc 100644
+index 11296cd4889..0f090446dc0 100644
 --- a/include/v8-template.h
 +++ b/include/v8-template.h
 @@ -939,6 +939,9 @@ class V8_EXPORT ObjectTemplate : public Template {
@@ -95,7 +95,7 @@ index 11296cd488..0f090446dc 100644
     * Support for TC39 "dynamic code brand checks" proposal.
     *
 diff --git a/include/v8config.h b/include/v8config.h
-index 33bb3f9431..f03936a972 100644
+index 33bb3f94316..f03936a972d 100644
 --- a/include/v8config.h
 +++ b/include/v8config.h
 @@ -532,7 +532,7 @@ path. Add it with -I<path> to the command line
@@ -108,7 +108,7 @@ index 33bb3f9431..f03936a972 100644
  # define V8_PRESERVE_MOST /* NOT SUPPORTED */
  #endif
 diff --git a/src/api/api-natives.cc b/src/api/api-natives.cc
-index aadb9ffb71..279c2f35ed 100644
+index 3015c2f80fb..cafd758b32a 100644
 --- a/src/api/api-natives.cc
 +++ b/src/api/api-natives.cc
 @@ -448,6 +448,9 @@ MaybeHandle<JSObject> InstantiateObject(Isolate* isolate,
@@ -122,28 +122,28 @@ index aadb9ffb71..279c2f35ed 100644
      // Keep prototypes in slow-mode. Let them be lazily turned fast later on.
      // TODO(dcarney): is this necessary?
 diff --git a/src/api/api.cc b/src/api/api.cc
-index a510fe68e6..0e94b2fa93 100644
+index f6505e6820b..00a0a06575e 100644
 --- a/src/api/api.cc
 +++ b/src/api/api.cc
-@@ -2110,6 +2110,17 @@ void ObjectTemplate::SetImmutableProto() {
+@@ -1921,6 +1921,17 @@ void ObjectTemplate::SetImmutableProto() {
    self->set_immutable_proto(true);
  }
  
 +bool ObjectTemplate::IsHostDelegate() const {
-+  return Utils::OpenHandle(this)->host_delegate();
++  return Utils::OpenDirectHandle(this)->host_delegate();
 +}
 +
 +void ObjectTemplate::SetHostDelegate() {
-+  auto self = Utils::OpenHandle(this);
++  auto self = Utils::OpenDirectHandle(this);
 +  i::Isolate* isolate = self->GetIsolate();
 +  ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
 +  self->set_host_delegate(true);
 +}
 +
  bool ObjectTemplate::IsCodeLike() const {
-   return Utils::OpenHandle(this)->code_like();
+   return Utils::OpenDirectHandle(this)->code_like();
  }
-@@ -6573,6 +6584,10 @@ bool v8::V8::InitializeICU(const char* icu_data_file) {
+@@ -6454,6 +6465,10 @@ bool v8::V8::InitializeICU(const char* icu_data_file) {
    return i::InitializeICU(icu_data_file);
  }
  
@@ -155,10 +155,10 @@ index a510fe68e6..0e94b2fa93 100644
                                            const char* icu_data_file) {
    return i::InitializeICUDefaultLocation(exec_path, icu_data_file);
 diff --git a/src/ast/ast.cc b/src/ast/ast.cc
-index 34a26d9c26..f995a2fc64 100644
+index 25a9bd3f82e..4e2ff80d108 100644
 --- a/src/ast/ast.cc
 +++ b/src/ast/ast.cc
-@@ -883,8 +883,11 @@ static bool MatchLiteralCompareTypeof(Expression* left, Token::Value op,
+@@ -886,8 +886,11 @@ static bool MatchLiteralCompareTypeof(Expression* left, Token::Value op,
    return false;
  }
  
@@ -171,7 +171,7 @@ index 34a26d9c26..f995a2fc64 100644
           MatchLiteralCompareTypeof(right_, op(), left_, expr, literal);
  }
 diff --git a/src/base/build_config.h b/src/base/build_config.h
-index 673330236c..30e752bc84 100644
+index 673330236ce..30e752bc843 100644
 --- a/src/base/build_config.h
 +++ b/src/base/build_config.h
 @@ -36,7 +36,7 @@
@@ -184,7 +184,7 @@ index 673330236c..30e752bc84 100644
  #define V8_HAS_PKU_JIT_WRITE_PROTECT 0
  #endif
 diff --git a/src/base/platform/platform.h b/src/base/platform/platform.h
-index 27369a7a8d..fc58ac3d1d 100644
+index 4ced4fdeddc..ca5ab82c54a 100644
 --- a/src/base/platform/platform.h
 +++ b/src/base/platform/platform.h
 @@ -52,6 +52,8 @@
@@ -197,11 +197,11 @@ index 27369a7a8d..fc58ac3d1d 100644
  #if V8_CC_MSVC && V8_HOST_ARCH_IA32
  // __readfsdword is supposed to be declared in intrin.h but it is missing from
 diff --git a/src/builtins/builtins-async-module.cc b/src/builtins/builtins-async-module.cc
-index e1a2a71c42..9152368a0e 100644
+index 9920f0b6dc1..61559e2d5fb 100644
 --- a/src/builtins/builtins-async-module.cc
 +++ b/src/builtins/builtins-async-module.cc
 @@ -15,7 +15,8 @@ BUILTIN(CallAsyncModuleFulfilled) {
-       SourceTextModule::cast(isolate->context().get(
+       SourceTextModule::cast(isolate->context()->get(
            SourceTextModule::ExecuteAsyncModuleContextSlots::kModule)),
        isolate);
 -  if (SourceTextModule::AsyncModuleExecutionFulfilled(isolate, module)
@@ -211,10 +211,10 @@ index e1a2a71c42..9152368a0e 100644
      // The evaluation of async module can not throwing a JavaScript observable
      // exception.
 diff --git a/src/codegen/code-stub-assembler.cc b/src/codegen/code-stub-assembler.cc
-index 012bf97622..013f83d963 100644
+index 5edbe168532..2fd4cbad80c 100644
 --- a/src/codegen/code-stub-assembler.cc
 +++ b/src/codegen/code-stub-assembler.cc
-@@ -2062,6 +2062,10 @@ TNode<Uint32T> CodeStubAssembler::LoadMapBitField3(TNode<Map> map) {
+@@ -2126,6 +2126,10 @@ TNode<Uint32T> CodeStubAssembler::LoadMapBitField3(TNode<Map> map) {
    return LoadObjectField<Uint32T>(map, Map::kBitField3Offset);
  }
  
@@ -225,7 +225,7 @@ index 012bf97622..013f83d963 100644
  TNode<Uint16T> CodeStubAssembler::LoadMapInstanceType(TNode<Map> map) {
    return LoadObjectField<Uint16T>(map, Map::kInstanceTypeOffset);
  }
-@@ -14552,6 +14556,11 @@ TNode<String> CodeStubAssembler::Typeof(TNode<Object> value) {
+@@ -14732,6 +14736,11 @@ TNode<String> CodeStubAssembler::Typeof(TNode<Object> value) {
  
    GotoIf(InstanceTypeEqual(instance_type, ODDBALL_TYPE), &if_oddball);
  
@@ -238,10 +238,10 @@ index 012bf97622..013f83d963 100644
        Word32And(LoadMapBitField(map),
                  Int32Constant(Map::Bits1::IsCallableBit::kMask |
 diff --git a/src/codegen/code-stub-assembler.h b/src/codegen/code-stub-assembler.h
-index 4e6d3c0dfa..c5aa9da763 100644
+index 24def3b60b9..169e3b1a19f 100644
 --- a/src/codegen/code-stub-assembler.h
 +++ b/src/codegen/code-stub-assembler.h
-@@ -1419,6 +1419,8 @@ class V8_EXPORT_PRIVATE CodeStubAssembler
+@@ -1491,6 +1491,8 @@ class V8_EXPORT_PRIVATE CodeStubAssembler
    TNode<Int32T> LoadMapBitField2(TNode<Map> map);
    // Load bit field 3 of a map.
    TNode<Uint32T> LoadMapBitField3(TNode<Map> map);
@@ -251,11 +251,11 @@ index 4e6d3c0dfa..c5aa9da763 100644
    TNode<Uint16T> LoadMapInstanceType(TNode<Map> map);
    // Load the ElementsKind of a map.
 diff --git a/src/common/code-memory-access-inl.h b/src/common/code-memory-access-inl.h
-index 4b8ac2e5c7..cd39ac8203 100644
+index e357648966e..c37396eff65 100644
 --- a/src/common/code-memory-access-inl.h
 +++ b/src/common/code-memory-access-inl.h
-@@ -29,31 +29,92 @@ RwxMemoryWriteScope::~RwxMemoryWriteScope() {
+@@ -97,31 +97,92 @@ void ThreadIsolation::WritableJitAllocation::ClearBytes(size_t offset,
-   }
+   memset(reinterpret_cast<void*>(address_ + offset), 0, len);
  }
  
 -#if V8_HAS_PTHREAD_JIT_WRITE_PROTECT
@@ -313,7 +313,7 @@ index 4b8ac2e5c7..cd39ac8203 100644
    }
  }
  
-+#else  // !V8_HAS_PTHREAD_JIT_WRITE_PROTECT && !V8_TRY_USE_PKU_JIT_WRITE_PROTECT
++#else  // !V8_HAS_PTHREAD_JIT_WRITE_PROTECT && !V8_HAS_PKU_JIT_WRITE_PROTECT
 +
 +// static
 +int RwxMemoryWriteScope::EnterHostScope() { return 0; }
@@ -352,7 +352,7 @@ index 4b8ac2e5c7..cd39ac8203 100644
  // static
  bool RwxMemoryWriteScope::IsSupported() {
    static_assert(base::MemoryProtectionKey::kNoMemoryProtectionKey == -1);
-@@ -72,31 +133,23 @@ bool RwxMemoryWriteScope::IsSupportedUntrusted() {
+@@ -140,31 +201,23 @@ bool RwxMemoryWriteScope::IsSupportedUntrusted() {
  }
  
  // static
@@ -386,7 +386,7 @@ index 4b8ac2e5c7..cd39ac8203 100644
  }
  
  #else  // !V8_HAS_PTHREAD_JIT_WRITE_PROTECT && !V8_TRY_USE_PKU_JIT_WRITE_PROTECT
-@@ -108,10 +161,10 @@ bool RwxMemoryWriteScope::IsSupported() { return false; }
+@@ -176,10 +229,10 @@ bool RwxMemoryWriteScope::IsSupported() { return false; }
  bool RwxMemoryWriteScope::IsSupportedUntrusted() { return false; }
  
  // static
@@ -400,7 +400,7 @@ index 4b8ac2e5c7..cd39ac8203 100644
  #endif  // V8_HAS_PTHREAD_JIT_WRITE_PROTECT
  
 diff --git a/src/common/code-memory-access.cc b/src/common/code-memory-access.cc
-index be3b9741d2..3a533926da 100644
+index 34ee8c78ca5..f6c4537f562 100644
 --- a/src/common/code-memory-access.cc
 +++ b/src/common/code-memory-access.cc
 @@ -2,10 +2,22 @@
@@ -435,10 +435,10 @@ index be3b9741d2..3a533926da 100644
  
  #if V8_HAS_PKU_JIT_WRITE_PROTECT
 diff --git a/src/common/code-memory-access.h b/src/common/code-memory-access.h
-index e90dcc9a64..78411014b2 100644
+index c44982d2256..b90eec27f46 100644
 --- a/src/common/code-memory-access.h
 +++ b/src/common/code-memory-access.h
-@@ -314,6 +314,9 @@ class V8_NODISCARD RwxMemoryWriteScope {
+@@ -122,6 +122,9 @@ class V8_NODISCARD RwxMemoryWriteScope {
    static V8_EXPORT void SetDefaultPermissionsForSignalHandler();
  #endif  // V8_HAS_PKU_JIT_WRITE_PROTECT
  
@@ -448,7 +448,7 @@ index e90dcc9a64..78411014b2 100644
   private:
    friend class CodePageMemoryModificationScope;
    friend class RwxMemoryWriteScopeForTesting;
-@@ -325,9 +328,13 @@ class V8_NODISCARD RwxMemoryWriteScope {
+@@ -133,9 +136,13 @@ class V8_NODISCARD RwxMemoryWriteScope {
    V8_INLINE static void SetWritable();
    V8_INLINE static void SetExecutable();
  
@@ -463,7 +463,7 @@ index e90dcc9a64..78411014b2 100644
  };
  
 diff --git a/src/diagnostics/unwinding-info-win64.cc b/src/diagnostics/unwinding-info-win64.cc
-index a71b866135..4f1d26676c 100644
+index a71b866135b..4f1d26676c2 100644
 --- a/src/diagnostics/unwinding-info-win64.cc
 +++ b/src/diagnostics/unwinding-info-win64.cc
 @@ -462,6 +462,14 @@ void InitUnwindingRecord(Record* record, size_t code_size_in_bytes) {
@@ -542,7 +542,7 @@ index a71b866135..4f1d26676c 100644
        // Unprotect reserved page.
        DWORD old_protect;
 diff --git a/src/execution/isolate-inl.h b/src/execution/isolate-inl.h
-index 8edeb5dfb8..9189c32794 100644
+index d956e5f088c..f882ef02606 100644
 --- a/src/execution/isolate-inl.h
 +++ b/src/execution/isolate-inl.h
 @@ -35,7 +35,6 @@ V8_INLINE Isolate* Isolate::TryGetCurrent() { return g_current_isolate_; }
@@ -554,10 +554,10 @@ index 8edeb5dfb8..9189c32794 100644
  }
  
 diff --git a/src/execution/stack-guard.cc b/src/execution/stack-guard.cc
-index efa6a6f0c4..d266dff4f5 100644
+index 563916a4e96..954e9eb242e 100644
 --- a/src/execution/stack-guard.cc
 +++ b/src/execution/stack-guard.cc
-@@ -209,8 +209,10 @@ void StackGuard::FreeThreadResources() {
+@@ -232,8 +232,10 @@ void StackGuard::FreeThreadResources() {
  void StackGuard::ThreadLocal::Initialize(Isolate* isolate,
                                           const ExecutionAccess& lock) {
    const uintptr_t kLimitSize = v8_flags.stack_size * KB;
@@ -570,31 +570,31 @@ index efa6a6f0c4..d266dff4f5 100644
    set_jslimit(SimulatorStack::JsLimitFromCLimit(isolate, limit));
    real_climit_ = limit;
 diff --git a/src/heap/factory.cc b/src/heap/factory.cc
-index 10c184779e..189974f664 100644
+index 462a3944e14..ab9ea0f0d3b 100644
 --- a/src/heap/factory.cc
 +++ b/src/heap/factory.cc
-@@ -2105,6 +2105,7 @@ Map Factory::InitializeMap(Map map, InstanceType type, int instance_size,
+@@ -2111,6 +2111,7 @@ Tagged<Map> Factory::InitializeMap(Tagged<Map> map, InstanceType type,
        Map::Bits3::ConstructionCounterBits::encode(Map::kNoSlackTracking) |
        Map::Bits3::IsExtensibleBit::encode(true);
-   map.set_bit_field3(bit_field3);
+   map->set_bit_field3(bit_field3);
-+  map.set_host_bit_field(0);
++  map->set_host_bit_field(0);
-   map.set_instance_type(type);
+   map->set_instance_type(type);
    ReadOnlyRoots ro_roots(roots);
-   map.init_prototype_and_constructor_or_back_pointer(ro_roots);
+   map->init_prototype_and_constructor_or_back_pointer(ro_roots);
 diff --git a/src/heap/setup-heap-internal.cc b/src/heap/setup-heap-internal.cc
-index de292a6ca8..c1d3b483f5 100644
+index 9f51a70c46c..fb2a712c56c 100644
 --- a/src/heap/setup-heap-internal.cc
 +++ b/src/heap/setup-heap-internal.cc
-@@ -302,6 +302,7 @@ AllocationResult Heap::AllocatePartialMap(InstanceType instance_type,
+@@ -298,6 +298,7 @@ AllocationResult Heap::AllocatePartialMap(InstanceType instance_type,
        Map::Bits3::OwnsDescriptorsBit::encode(true) |
        Map::Bits3::ConstructionCounterBits::encode(Map::kNoSlackTracking);
-   map.set_bit_field3(bit_field3);
+   map->set_bit_field3(bit_field3);
-+  map.set_host_bit_field(0);
++  map->set_host_bit_field(0);
-   DCHECK(!map.is_in_retained_map_list());
+   DCHECK(!map->is_in_retained_map_list());
-   map.clear_padding();
+   map->clear_padding();
-   map.set_elements_kind(TERMINAL_FAST_ELEMENTS_KIND);
+   map->set_elements_kind(TERMINAL_FAST_ELEMENTS_KIND);
 diff --git a/src/init/icu_util.cc b/src/init/icu_util.cc
-index 67d349557c..49ffb52386 100644
+index 67d349557c6..49ffb52386b 100644
 --- a/src/init/icu_util.cc
 +++ b/src/init/icu_util.cc
 @@ -98,6 +98,26 @@ bool InitializeICU(const char* icu_data_file) {
@@ -625,7 +625,7 @@ index 67d349557c..49ffb52386 100644
  #undef ICU_UTIL_DATA_STATIC
  
 diff --git a/src/init/icu_util.h b/src/init/icu_util.h
-index e127e75f10..b0e4bd2d68 100644
+index e127e75f10f..b0e4bd2d68e 100644
 --- a/src/init/icu_util.h
 +++ b/src/init/icu_util.h
 @@ -5,6 +5,8 @@
@@ -646,7 +646,7 @@ index e127e75f10..b0e4bd2d68 100644
  // Like above, but using the default icudt[lb].dat location if icu_data_file is
  // not specified.
 diff --git a/src/init/v8.cc b/src/init/v8.cc
-index 71b811a107..64c43485ea 100644
+index 7200df07078..d98d23f708d 100644
 --- a/src/init/v8.cc
 +++ b/src/init/v8.cc
 @@ -95,7 +95,6 @@ V8_DECLARE_ONCE(init_snapshot_once);
@@ -658,10 +658,10 @@ index 71b811a107..64c43485ea 100644
    platform_ = platform;
    v8::base::SetPrintStackTrace(platform_->GetStackTracePrinter());
 diff --git a/src/libplatform/default-platform.cc b/src/libplatform/default-platform.cc
-index b1617b5f9a..0452721beb 100644
+index 958aa0b9841..1f48b84928b 100644
 --- a/src/libplatform/default-platform.cc
 +++ b/src/libplatform/default-platform.cc
-@@ -55,6 +55,10 @@ std::unique_ptr<v8::Platform> NewDefaultPlatform(
+@@ -57,6 +57,10 @@ std::unique_ptr<v8::Platform> NewDefaultPlatform(
    return platform;
  }
  
@@ -673,10 +673,10 @@ index b1617b5f9a..0452721beb 100644
      IdleTaskSupport idle_task_support,
      InProcessStackDumping in_process_stack_dumping,
 diff --git a/src/objects/js-objects.cc b/src/objects/js-objects.cc
-index b2a0e553a0..a774ea3c24 100644
+index 6094323ee09..c1d645c631d 100644
 --- a/src/objects/js-objects.cc
 +++ b/src/objects/js-objects.cc
-@@ -5301,6 +5301,13 @@ void JSObject::SetImmutableProto(Handle<JSObject> object) {
+@@ -5329,6 +5329,13 @@ void JSObject::SetImmutableProto(Handle<JSObject> object) {
    object->set_map(*new_map, kReleaseStore);
  }
  
@@ -691,10 +691,10 @@ index b2a0e553a0..a774ea3c24 100644
                                          JavaScriptArguments* args,
                                          uint32_t arg_count,
 diff --git a/src/objects/js-objects.h b/src/objects/js-objects.h
-index 4b79f67fd3..27e4636e58 100644
+index 82d367affe3..911b4036f85 100644
 --- a/src/objects/js-objects.h
 +++ b/src/objects/js-objects.h
-@@ -748,6 +748,8 @@ class JSObject : public TorqueGeneratedJSObject<JSObject, JSReceiver> {
+@@ -763,6 +763,8 @@ class JSObject : public TorqueGeneratedJSObject<JSObject, JSReceiver> {
    // Never called from JavaScript
    static void SetImmutableProto(Handle<JSObject> object);
  
@@ -704,32 +704,32 @@ index 4b79f67fd3..27e4636e58 100644
    // the caller to initialize object header. Fill the pre-allocated fields with
    // undefined_value and the rest with filler_map.
 diff --git a/src/objects/map-inl.h b/src/objects/map-inl.h
-index 7eb247eacf..844adc05ff 100644
+index 4856ecb7a8d..5a148dd3859 100644
 --- a/src/objects/map-inl.h
 +++ b/src/objects/map-inl.h
-@@ -126,6 +126,9 @@ BIT_FIELD_ACCESSORS(Map, bit_field3, may_have_interesting_properties,
+@@ -128,6 +128,9 @@ BIT_FIELD_ACCESSORS(Map, bit_field3, may_have_interesting_properties,
  BIT_FIELD_ACCESSORS(Map, relaxed_bit_field3, construction_counter,
                      Map::Bits3::ConstructionCounterBits)
  
 +// |host_bit_field| fields.
 +BIT_FIELD_ACCESSORS(Map, host_bit_field, is_host_delegate, Map::HostBits::IsHostDelegateBit)
 +
- DEF_GETTER(Map, GetNamedInterceptor, InterceptorInfo) {
+ DEF_GETTER(Map, GetNamedInterceptor, Tagged<InterceptorInfo>) {
    DCHECK(has_named_interceptor());
-   FunctionTemplateInfo info = GetFunctionTemplateInfo(cage_base);
+   Tagged<FunctionTemplateInfo> info = GetFunctionTemplateInfo(cage_base);
 diff --git a/src/objects/map.cc b/src/objects/map.cc
-index 5582485fd0..cded5cbee0 100644
+index 798c9c59535..975f264363e 100644
 --- a/src/objects/map.cc
 +++ b/src/objects/map.cc
-@@ -1177,6 +1177,7 @@ Handle<Map> Map::RawCopy(Isolate* isolate, Handle<Map> src_handle,
+@@ -1190,6 +1190,7 @@ Handle<Map> Map::RawCopy(Isolate* isolate, Handle<Map> src_handle,
      }
      // Same as bit_field comment above.
-     raw.set_bit_field3(new_bit_field3);
+     raw->set_bit_field3(new_bit_field3);
-+    raw.set_host_bit_field(src.host_bit_field());
++    raw->set_host_bit_field(src->host_bit_field());
-     raw.clear_padding();
+     raw->clear_padding();
    }
    Handle<HeapObject> prototype(src_handle->prototype(), isolate);
-@@ -1303,6 +1304,12 @@ Handle<Map> Map::TransitionToImmutableProto(Isolate* isolate, Handle<Map> map) {
+@@ -1316,6 +1317,12 @@ Handle<Map> Map::TransitionToImmutableProto(Isolate* isolate, Handle<Map> map) {
    return new_map;
  }
  
@@ -743,10 +743,10 @@ index 5582485fd0..cded5cbee0 100644
  void EnsureInitialMap(Isolate* isolate, Handle<Map> map) {
  #ifdef DEBUG
 diff --git a/src/objects/map.h b/src/objects/map.h
-index af5e9ae236..30a27cab82 100644
+index 2853bdc738f..88ce6b166db 100644
 --- a/src/objects/map.h
 +++ b/src/objects/map.h
-@@ -324,6 +324,11 @@ class Map : public TorqueGeneratedMap<Map, HeapObject> {
+@@ -327,6 +327,11 @@ class Map : public TorqueGeneratedMap<Map, HeapObject> {
    static_assert(kSlackTrackingCounterStart <=
                  Bits3::ConstructionCounterBits::kMax);
  
@@ -758,7 +758,7 @@ index af5e9ae236..30a27cab82 100644
    // Inobject slack tracking is the way to reclaim unused inobject space.
    //
    // The instance size is initially determined by adding some slack to
-@@ -686,6 +691,8 @@ class Map : public TorqueGeneratedMap<Map, HeapObject> {
+@@ -692,6 +697,8 @@ class Map : public TorqueGeneratedMap<Map, HeapObject> {
  
    DECL_BOOLEAN_ACCESSORS(is_immutable_proto)
  
@@ -767,7 +767,7 @@ index af5e9ae236..30a27cab82 100644
    // This counter is used for in-object slack tracking.
    // The in-object slack tracking is considered enabled when the counter is
    // non zero. The counter only has a valid count for initial maps. For
-@@ -868,6 +875,8 @@ class Map : public TorqueGeneratedMap<Map, HeapObject> {
+@@ -869,6 +876,8 @@ class Map : public TorqueGeneratedMap<Map, HeapObject> {
    static Handle<Map> TransitionToImmutableProto(Isolate* isolate,
                                                  Handle<Map> map);
  
@@ -777,7 +777,7 @@ index af5e9ae236..30a27cab82 100644
  
    static_assert(kInstanceTypeOffset == Internals::kMapInstanceTypeOffset);
 diff --git a/src/objects/map.tq b/src/objects/map.tq
-index 590fac8d96..dcadae3285 100644
+index 590fac8d969..dcadae3285c 100644
 --- a/src/objects/map.tq
 +++ b/src/objects/map.tq
 @@ -34,6 +34,10 @@ bitfield struct MapBitFields3 extends uint32 {
@@ -803,27 +803,28 @@ index 590fac8d96..dcadae3285 100644
    prototype: JSReceiver|Null;
    constructor_or_back_pointer_or_native_context: Object;
 diff --git a/src/objects/objects.cc b/src/objects/objects.cc
-index 5d6bd464c1..20ac4feed4 100644
+index d55f192de84..a7c7f4937bf 100644
 --- a/src/objects/objects.cc
 +++ b/src/objects/objects.cc
-@@ -902,6 +902,12 @@ Handle<String> Object::TypeOf(Isolate* isolate, Handle<Object> object) {
+@@ -911,7 +911,12 @@ Handle<String> Object::TypeOf(Isolate* isolate, Handle<Object> object) {
-   if (object->IsString()) return isolate->factory()->string_string();
+   if (IsString(*object)) return isolate->factory()->string_string();
-   if (object->IsSymbol()) return isolate->factory()->symbol_string();
+   if (IsSymbol(*object)) return isolate->factory()->symbol_string();
-   if (object->IsBigInt()) return isolate->factory()->bigint_string();
+   if (IsBigInt(*object)) return isolate->factory()->bigint_string();
-+  if (object->IsJSObject()) {
+-  if (IsCallable(*object)) return isolate->factory()->function_string();
++  if (IsJSObject(*object)) {
 +    Handle<JSObject> obj = Handle<JSObject>::cast(object);
 +    if (obj->HasNamedInterceptor()) {
-+      return obj->map().is_host_delegate() ? isolate->factory()->function_string() : isolate->factory()->object_string();
++      return obj->map()->is_host_delegate() ? isolate->factory()->function_string() : isolate->factory()->object_string();
 +    }
-+  }
++  }  if (IsCallable(*object)) return isolate->factory()->function_string();
-   if (object->IsCallable()) return isolate->factory()->function_string();
    return isolate->factory()->object_string();
  }
+ 
 diff --git a/src/objects/source-text-module.cc b/src/objects/source-text-module.cc
-index 8a9d2cff94..9c566709b8 100644
+index 6d391b2bebc..d14dbc17f7e 100644
 --- a/src/objects/source-text-module.cc
 +++ b/src/objects/source-text-module.cc
-@@ -746,7 +746,7 @@ MaybeHandle<Object> SourceTextModule::Evaluate(
+@@ -747,7 +747,7 @@ MaybeHandle<Object> SourceTextModule::Evaluate(
      if (!module->IsAsyncEvaluating()) {
        //   i. Perform ! Call(capability.[[Resolve]], undefined,
        //                     «undefined»).
@@ -832,7 +833,7 @@ index 8a9d2cff94..9c566709b8 100644
            .ToHandleChecked();
      }
  
-@@ -759,7 +759,7 @@ MaybeHandle<Object> SourceTextModule::Evaluate(
+@@ -760,7 +760,7 @@ MaybeHandle<Object> SourceTextModule::Evaluate(
  }
  
  Maybe<bool> SourceTextModule::AsyncModuleExecutionFulfilled(
@@ -841,7 +842,7 @@ index 8a9d2cff94..9c566709b8 100644
    // 1. If module.[[Status]] is evaluated, then
    if (module->status() == kErrored) {
      // a. Assert: module.[[EvaluationError]] is not empty.
-@@ -783,7 +783,7 @@ Maybe<bool> SourceTextModule::AsyncModuleExecutionFulfilled(
+@@ -784,7 +784,7 @@ Maybe<bool> SourceTextModule::AsyncModuleExecutionFulfilled(
      //                     «undefined»).
      Handle<JSPromise> capability(
          JSPromise::cast(module->top_level_capability()), isolate);
@@ -850,7 +851,7 @@ index 8a9d2cff94..9c566709b8 100644
          .ToHandleChecked();
    }
  
-@@ -849,7 +849,7 @@ Maybe<bool> SourceTextModule::AsyncModuleExecutionFulfilled(
+@@ -850,7 +850,7 @@ Maybe<bool> SourceTextModule::AsyncModuleExecutionFulfilled(
            //                     undefined, «undefined»).
            Handle<JSPromise> capability(
                JSPromise::cast(m->top_level_capability()), isolate);
@@ -860,7 +861,7 @@ index 8a9d2cff94..9c566709b8 100644
          }
        }
 diff --git a/src/objects/source-text-module.h b/src/objects/source-text-module.h
-index 05a1cef551..9b58cc8385 100644
+index 55754c0a7d4..09cc31846d2 100644
 --- a/src/objects/source-text-module.h
 +++ b/src/objects/source-text-module.h
 @@ -58,7 +58,7 @@ class SourceTextModule
@@ -873,10 +874,10 @@ index 05a1cef551..9b58cc8385 100644
                                             Handle<SourceTextModule> module,
                                             Handle<Object> exception);
 diff --git a/src/objects/templates-inl.h b/src/objects/templates-inl.h
-index 1455538b5e..0197c87a7c 100644
+index afa42afc4e6..f8d5e7717cb 100644
 --- a/src/objects/templates-inl.h
 +++ b/src/objects/templates-inl.h
-@@ -180,6 +180,14 @@ void ObjectTemplateInfo::set_code_like(bool is_code_like) {
+@@ -184,6 +184,14 @@ void ObjectTemplateInfo::set_code_like(bool is_code_like) {
    return set_data(IsCodeKindBit::update(data(), is_code_like));
  }
  
@@ -888,23 +889,23 @@ index 1455538b5e..0197c87a7c 100644
 +  return set_data(IsHostDelegateBit::update(data(), value));
 +}
 +
- bool FunctionTemplateInfo::IsTemplateFor(JSObject object) {
+ bool FunctionTemplateInfo::IsTemplateFor(Tagged<JSObject> object) const {
-   return IsTemplateFor(object.map());
+   return IsTemplateFor(object->map());
  }
 diff --git a/src/objects/templates.h b/src/objects/templates.h
-index d48beb9555..5e6a3a23af 100644
+index 1683a7cb0bc..dd0c7ac149a 100644
 --- a/src/objects/templates.h
 +++ b/src/objects/templates.h
-@@ -206,6 +206,7 @@ class ObjectTemplateInfo
+@@ -207,6 +207,7 @@ class ObjectTemplateInfo
    DECL_INT_ACCESSORS(embedder_field_count)
    DECL_BOOLEAN_ACCESSORS(immutable_proto)
    DECL_BOOLEAN_ACCESSORS(code_like)
 +  DECL_BOOLEAN_ACCESSORS(host_delegate)
  
-   // Dispatched behavior.
+   // Starting from given object template's constructor walk up the inheritance
-   DECL_PRINTER(ObjectTemplateInfo)
+   // chain till a function template that has an instance template is found.
 diff --git a/src/objects/templates.tq b/src/objects/templates.tq
-index fec43b195e..17a121316c 100644
+index fec43b195e7..17a121316c7 100644
 --- a/src/objects/templates.tq
 +++ b/src/objects/templates.tq
 @@ -71,7 +71,8 @@ extern class FunctionTemplateInfo extends TemplateInfo {

V8Update.cmd

@@ -1,8 +1,9 @@
 @echo off
 setlocal
 
-set v8testedrev=11.6.189.18
+set v8testedrev=11.8.172.15
 set v8testedcommit=
+set v8cherrypicks=28a7e2d45fd620fa68fb0678a7246fc8e426d1cc
 
 if not "%v8testedcommit%"=="" goto ProcessArgs
 set v8testedcommit=%v8testedrev%
@@ -184,6 +185,10 @@ call git config user.name ClearScript
 if errorlevel 1 goto Error
 call git config user.email "ClearScript@microsoft.com"
 if errorlevel 1 goto Error
+if "%v8cherrypicks%"=="" goto ApplyV8Patch
+call git cherry-pick --allow-empty-message --keep-redundant-commits %v8cherrypicks% >applyCherryPicks.log 2>&1
+if errorlevel 1 goto Error
+:ApplyV8Patch
 call git apply --reject --ignore-whitespace ..\..\V8Patch.txt 2>applyV8Patch.log
 if errorlevel 1 goto Error
 cd ..

Version.tt

@@ -1,5 +1,5 @@
 <#
-    var version = new Version(7, 4, 3);
+    var version = new Version(7, 4, 4);
     var versionSuffix = string.Empty;
     new Random(versionSuffix.Length); // suppress "versionSuffix not used" warning
 #>

docs/Gemfile.lock

@@ -1,13 +1,20 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.0.7.2)
+    activesupport (7.1.0)
+      base64
+      bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
+      drb
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
+      mutex_m
       tzinfo (~> 2.0)
     addressable (2.8.5)
       public_suffix (>= 2.0.2, < 6.0)
+    base64 (0.1.1)
+    bigdecimal (3.1.4)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
@@ -15,20 +22,24 @@ GEM
     colorator (1.1.0)
     commonmarker (0.23.10)
     concurrent-ruby (1.2.2)
+    connection_pool (2.4.1)
     dnsruby (1.70.0)
       simpleidn (~> 0.2.1)
+    drb (2.1.1)
+      ruby2_keywords
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     ethon (0.16.0)
       ffi (>= 1.15.0)
     eventmachine (1.2.7)
-    execjs (2.8.1)
+    execjs (2.9.1)
-    faraday (2.7.10)
+    faraday (2.7.11)
+      base64
       faraday-net_http (>= 2.0, < 3.1)
       ruby2_keywords (>= 0.0.4)
     faraday-net_http (3.0.2)
-    ffi (1.15.5)
+    ffi (1.16.3)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
     github-pages (228)
@@ -209,8 +220,9 @@ GEM
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minitest (5.19.0)
+    minitest (5.20.0)
-    nokogiri (1.15.3-x86_64-linux)
+    mutex_m (0.1.2)
+    nokogiri (1.15.4-x86_64-linux)
       racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)

docs/Reference/fti/FTI_106.json

@@ -1 +1 @@
-{"javascriptobjectflags":[34078721,47513606,56098820],"json":[3538946,24379396,25100291,28049409,29032449,37421058,39452678,55443458,57016322,57606146],"java":[3801089,16187393,16449537,17235969,17498113,17956865,18546689,19202049,19595265,20054017,20512769,20905985,34078721,38141953,55640065,56098817,56623105],"jscript":[5963777,6553601,28311553,28835842,29491202,30277634,31064066,31588353,32047107,32243714,33161218,34013186,34209798,34865154,36110339,36372482,36569094,37093378,44498945,49872897,53084161,55181319,55836673,56492033,57344002,59310083,59834375],"javascript":[2621441,2686977,2752513,3145729,3211265,3407873,3801089,7077889,7798785,7929857,8060929,8388609,8585217,8716289,8781825,9306113,9437186,9502721,9568257,9633793,9830401,9895937,10158081,10223617,10289153,10682369,10747905,10813441,10878977,10944513,11665409,11862017,11927553,12320769,12451841,12779521,12845057,13434881,15138818,15204353,15269890,15925250,16187394,16252930,16449538,16515074,16842754,16973826,17235970,17301506,17498114,17825794,17956866,18153474,18546690,18874370,19202050,19595266,19660802,20054018,20250626,20512770,20905986,34078731,35258371,35979265,36634625,36962307,38010883,38141953,38928387,39714817,45088770,45416451,45678594,46202882,46661633,46792706,47513603,47775747,47841281,48168963,48824322,49414146,49610755,50069505,50331650,52559877,52690945,53477377,53673989,53936129,54788102,55640068,56098819,56623107,56885252,56950785,57344004,57606150,59965445,60162052,60293125],"javascriptobjectkind":[34078721,48168966,56623108],"javascrip":[13959169,20643841,44302337,48234497,60358657],"javascriptextensions":[3801090,16187393,16449537,17235969,17498113,17956865,18546689,19202049,19595265,20054017,20512769,20905985,34078721,38141953,55640070],"jscriptengine":[5963778,6553602,28311554,28835845,29491205,30277637,31064069,31588354,32047109,32243717,33161221,34013189,34209798,34865157,36110341,36372481,36569094,37093377,44498946,49872898,53084162,55181323,56492034,59113473,59310082,59834379,60489729],"just":[58458114,59310081]}
+{"javascriptobjectflags":[42008577,55640070,56885252],"json":[3538946,21626884,22282243,24969217,29753345,38731778,41811974,55705602,57802754,58851330],"java":[3342337,16711681,18087937,19660801,20578305,20840449,21495809,22020097,22544385,22806529,23527425,24313857,41549825,42008577,56492033,56885249,57409537],"jscript":[5832705,6684673,29818882,30343170,30801921,31064066,31457282,31916034,32178178,32243714,32702466,32768002,32899075,33685506,34340865,34865155,38666246,42074118,44630017,50528257,50921473,54788097,55246849,56360962,59637763,60751879,61603847],"javascript":[2752513,2818049,2949121,3080193,3211265,3342337,3604481,7208961,7733249,7864321,8126466,8585217,8650753,8716289,9306113,9568257,9699329,9764865,9830401,10092545,10158081,10289153,10354689,10420225,10485761,10616833,10747905,10813441,10878977,11141121,11337729,11403265,11599873,11796481,12124161,12255233,12779521,13762561,13893633,15007746,15597570,15859714,16252930,16580610,16646146,16711682,17039362,17498114,17956866,18022402,18087938,18415618,19070978,19660802,19988482,20578306,20840450,21495810,22020098,22544386,22806530,23527426,24313858,31391747,36765699,37683203,38469635,38862849,39780353,40304641,41222147,41549825,41615361,41680899,42008587,42336258,42926082,43712514,44695553,50462723,51118082,51511299,51576833,51707905,52232194,52953090,53477377,53608453,54591490,54919169,55312390,55640067,56360964,56492036,56885251,57409539,57671684,58458113,58851334,60620805,60882948,61014021,61210629],"javascriptobjectkind":[41680902,42008577,57409540],"javascrip":[15663105,18808833,50003969,56426497,61145089],"javascriptextensions":[3342338,16711681,18087937,19660801,20578305,20840449,21495809,22020097,22544385,22806529,23527425,24313857,41549825,42008577,56492038],"jscriptengine":[5832706,6684674,29818885,30343173,30801922,31064069,31457285,31916037,32178181,32243713,32702469,32768001,32899077,33685509,34340866,34865157,38666246,42074118,44630018,50528258,50921474,54788098,59375617,59637762,60751883,61407233,61603851],"just":[59113474,59637761]}

docs/Reference/fti/FTI_107.json

@@ -1 +1 @@
-{"kind":[21823490,22740994,23789570,24248322,24510466,24576002,24838146,25165826,25493506,25559042,25821186,26083330,26148866,26607618,26673154,26935298,27066370,27131906,27394050,27721730,27918338,28573698,28704770,29163522,29229058,29294594,29425666,29753346,30474242,30539778,30670850,30801922,31457282,31653890,32309250,32833538,36962306,38010882,38928386,45416450,47775746,48168966,49610754,52559874,53673986,54788098,55967745,56623106,57606145,59965442,60162050,60293122],"keys":[40828929,41680897,42270722,42336263,57409537,58523650,58589185],"key":[2490372,16318470,17694727,18350086,20316166,41287686,42270721,47448065,58523653,59899905],"keyword":[13959169,20643841],"keyvaluepair":[2490374,42270722,58523664,58589192],"kinds":[34078721,56623105]}
+{"kind":[23986178,24182786,24707074,24903682,25034754,25952258,26148866,26542082,26673154,26738690,26935298,27131906,27394050,27590658,27656194,27787266,28049410,28180482,28377090,28442626,28639234,28770306,28901378,29229058,29294594,29491202,29884418,29949954,30146562,30212098,30408706,31195138,31522818,32505858,34471938,35454978,36765698,37683202,38469634,41222146,41680902,50462722,51511298,53608450,55312386,56688641,57409538,58851329,60620802,60882946,61014018,61210626],"keys":[40501249,43450369,44498945,45613063,45875202,57737217,58195969,58982402,59047937],"key":[3276804,16973830,17694726,18939911,19791878,44892166,45481985,45875201,58982405,60555265],"keyword":[15663105,18808833],"keyvaluepair":[3276806,45875202,58982416,59047944],"kinds":[42008577,57409537]}

docs/Reference/fti/FTI_113.json

@@ -1 +1 @@
-{"qux":[10747905],"qualified":[1703937,3604481,8060929,9437185,10289153,12845057,13041665,13303809,13631489,13828097,14155777,14286849,17629185,18415617,22806529,23920641,56688641,58064897]}
+{"qux":[11599873],"qualified":[1769473,3670017,8126465,9830401,10813441,12189697,13041665,13238273,13893633,14876673,15728641,17170433,17891329,19464193,20119553,21954561,57147393,58720257]}

docs/Reference/fti/FTI_119.json

@@ -1 +1 @@
-{"www":[15204353],"writeruntimeheapsnapshot":[7340033,29032452,56950785],"writeheapsnapshot":[4784129,28049412,59179009],"windowsscriptengineflags":[29491205,30736389,31064069,32047109,33030149,33161221,33947653,34209795,34799621,34865157,35323907,35586053,35848197,36110341,36372481,36569091,36831237,36896773,37355523,55181315,57802755,59310084,59834371,60424195],"windowsscriptengine":[5963782,6225926,6553606,6619142,8650754,9109512,31260673,31916033,32768001,34275330,34996225,35520513,35913729,36372481,36831236,36896772,37093377,44498948,46006276,47316994,49872901,51052549,52494342,54525953,55050241,55181329,55377921,55771137,56950785,57212929,57802769,59113494,59506689,59834383,60424207,60489736],"writes":[3538945,4784129,7340033,25100289,28049409,29032449,57016321,56950785,59179009],"written":[40697857,43253761,58720257],"webclient":[11862020],"writable":[16580609,17367041,18022401,20774913,38993922,58589186,58851329],"window":[4456449,30343169,47710210,55050241,56164354,60555266],"way":[9437185,13959169,20643841],"write":[3407873,10747905,16842757,17825793,19660801,25100290,28049410,29032450,54788097],"wrapnullresult":[8192002,44302337,48234497,49283073,54591489,60358657],"writeline":[8716289,8781825,11862019],"writer":[3538945,25100295,57016321],"widget":[8388609],"work":[58458114],"webclientt":[11862018],"waited":[56295425],"web":[11862018,37945345,54853633],"waiting":[7340033,25690113,56950785],"wrapping":[8192001,42729473,43384833,44302338,44498945,45023233,46006273,47316993,48234498,49872897,51052545,52494337,55181313,56950785,57802753,59113473,59375617,59506689,59834369,60424193,60489729],"writejson":[3538945,25100292,57016321],"wrapped":[50069505,52690945],"windows":[458753,589825,1376260,1441796,4456449,4915201,4980737,5963777,6225921,6488065,6553601,6619137,7143425,8650754,9109506,13959169,14680065,16187393,16449537,20512769,20643841,20905985,21364737,27525124,28311556,28835844,29491205,30081028,30277636,30343172,30736389,30867460,30932996,30998532,31064069,31260677,31391748,31588356,31784964,31916037,31981572,32047109,32243716,32374788,32440324,32505860,32636932,32768005,32964612,33030149,33161221,33423364,33882116,33947653,34013188,34209793,34275333,34668545,34734084,34799621,34865157,34996229,35323905,35520517,35586053,35848197,35913730,36110341,36372487,36569089,36831239,36896775,37093381,37355521,41943041,44498945,46006273,47316994,47710209,48431105,49872897,51052545,52494338,53084164,53739524,54525957,55050245,55181320,55377925,55771141,55836678,56164356,56229889,56295426,56492036,56819716,57212933,57344006,57802760,58982405,59113484,59310086,59506689,59834374,60030982,60424198,60489739,60555269,60620805],"writebytes":[2621441,2686977,2752513,3211265,3407873,17825796,19660804,53673985,54788097,59965441,60162049,60293121],"wait":[56295425,57606145],"weight":[8388609]}
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docs/Reference/fti/FTI_121.json

@@ -1 +1 @@
-{"yields":[57606145],"young":[39256065,51118082,59441153],"yield":[7405569,8060929,9437185,12517377,13041665,13303809,13828097,14155777,14548993,15073281,15532033,16121857,17629185,18415617,19070977,19857409,20381697,21233665,22806529,23920641,24903681]}
+{"yields":[58851329],"young":[39518209,54132738,60293121],"yield":[7143425,8126465,9830401,13238273,13303809,13828097,13959169,14155777,14614529,14876673,15728641,17170433,17891329,18612225,18677761,19136513,19464193,20119553,21954561,22872065,23658497]}

docs/Reference/fti/FTI_122.json

@@ -1 +1 @@
-{"zero":[44040193,46858241,47382529,49741825,59637761]}
+{"zero":[44367873,45547521,47972353,53936129,60162049]}

docs/Reference/html/E_Microsoft_ClearScript_PropertyBag_PropertyChanged.htm

@@ -1,6 +1,6 @@
 <html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="Microsoft.Help.SelfBranded" content="true" /><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Locale" content="en-us" /><meta name="Microsoft.Help.TopicLocale" content="en-us" /><link rel="shortcut icon" href="../icons/favicon.ico" /><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"></script><title>PropertyBag.PropertyChanged Event</title><meta name="Title" content="PropertyChanged Event" /><meta name="Microsoft.Help.Id" content="E:Microsoft.ClearScript.PropertyBag.PropertyChanged" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="System.Keywords" content="PropertyBag.PropertyChanged event" /><meta name="System.Keywords" content="PropertyChanged event" /><meta name="Microsoft.Help.F1" content="Microsoft.ClearScript.PropertyBag.PropertyChanged" /><meta name="Microsoft.Help.F1" content="PropertyBag.PropertyChanged" /><meta name="Microsoft.Help.F1" content="PropertyChanged" /><meta name="container" content="Microsoft.ClearScript" /><meta name="file" content="E_Microsoft_ClearScript_PropertyBag_PropertyChanged" /><meta name="guid" content="E_Microsoft_ClearScript_PropertyBag_PropertyChanged" /><meta name="Description" content="Occurs when a property is added or replaced, or when the collection is cleared." /><link rel="stylesheet" type="text/css" href="../styles/branding-Website.css" /><script type="text/javascript" src="../scripts/jquery-3.5.1.min.js"></script><script type="text/javascript" src="../scripts/branding-Website.js"></script><script type="text/javascript" src="../scripts/clipboard.min.js"></script></head><body onload="SetDefaultLanguage('cs');"><input type="hidden" id="userDataCache" class="userDataStyle" /><div id="PageHeader" class="pageHeader">ClearScript Library<form id="SearchForm" method="get" action="#" onsubmit="TransferToSearchPage(); return false;"><input id="SearchTextBox" type="text" maxlength="200" /><button id="SearchButton" type="submit"></button></form></div><div class="pageBody"><div class="leftNav" id="leftNav"><div id="tocNav"><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library" tocid="roottoc">ClearScript Library</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library Reference" tocid="R_Project_Reference">ClearScript Library Reference</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/N_Microsoft_ClearScript.htm" title="Microsoft.ClearScript" tocid="N_Microsoft_ClearScript">Microsoft.ClearScript</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/T_Microsoft_ClearScript_PropertyBag.htm" title="PropertyBag Class" tocid="T_Microsoft_ClearScript_PropertyBag">PropertyBag Class</a></div><div class="toclevel1" data-toclevel="1" data-childrenloaded="true"><a class="tocExpanded" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/Events_T_Microsoft_ClearScript_PropertyBag.htm" title="PropertyBag Events" tocid="Events_T_Microsoft_ClearScript_PropertyBag">PropertyBag Events</a></div><div class="toclevel2 current" data-toclevel="2"><a data-tochassubtree="false" href="../html/E_Microsoft_ClearScript_PropertyBag_PropertyChanged.htm" title="PropertyChanged Event" tocid="E_Microsoft_ClearScript_PropertyBag_PropertyChanged">PropertyChanged Event</a></div></div><div id="tocResizableEW" onmousedown="OnMouseDown(event);"></div><div id="TocResize" class="tocResize"><img id="ResizeImageIncrease" src="../icons/TocOpen.gif" onclick="OnIncreaseToc()" alt="Click or drag to resize" title="Click or drag to resize" /><img id="ResizeImageReset" src="../icons/TocClose.gif" style="display:none" onclick="OnResetToc()" alt="Click or drag to resize" title="Click or drag to resize" /></div></div><div id="TopicContent" class="topicContent"><table class="titleTable"><tr><td class="titleColumn"><h1>Property<wbr />Bag<span id="LSTB9514013_0" data-languageSpecificText="cpp=::|nu=."></span>Property<wbr />Changed Event</h1></td></tr></table><div class="summary">
             Occurs when a property is added or replaced, or when the collection is cleared.
-            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript</a><br /><strong>Assembly:</strong> ClearScript.Core (in ClearScript.Core.dll) Version: 7.4.3<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> event <span class="identifier">PropertyChangedEventHandler</span> <span class="identifier">PropertyChanged</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> Event <span class="identifier">PropertyChanged</span> <span class="keyword">As</span> <span class="identifier">PropertyChangedEventHandler</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
+            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript</a><br /><strong>Assembly:</strong> ClearScript.Core (in ClearScript.Core.dll) Version: 7.4.4<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> event <span class="identifier">PropertyChangedEventHandler</span> <span class="identifier">PropertyChanged</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> Event <span class="identifier">PropertyChanged</span> <span class="keyword">As</span> <span class="identifier">PropertyChangedEventHandler</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
 <span class="keyword">virtual</span>  <span class="keyword">event</span> <span class="identifier">PropertyChangedEventHandler</span>^ <span class="identifier">PropertyChanged</span> {
 	<span class="keyword">void</span> <span class="keyword">add</span> (<span class="identifier">PropertyChangedEventHandler</span>^ <span class="parameter">value</span>);
 	<span class="keyword">void</span> <span class="keyword">remove</span> (<span class="identifier">PropertyChangedEventHandler</span>^ <span class="parameter">value</span>);

docs/Reference/html/E_Microsoft_ClearScript_V8_V8Runtime_DebuggerConnected.htm

@@ -1,6 +1,6 @@
 <html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="Microsoft.Help.SelfBranded" content="true" /><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Locale" content="en-us" /><meta name="Microsoft.Help.TopicLocale" content="en-us" /><link rel="shortcut icon" href="../icons/favicon.ico" /><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"></script><title>V8Runtime.DebuggerConnected Event</title><meta name="Title" content="DebuggerConnected Event" /><meta name="Microsoft.Help.Id" content="E:Microsoft.ClearScript.V8.V8Runtime.DebuggerConnected" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="System.Keywords" content="V8Runtime.DebuggerConnected event" /><meta name="System.Keywords" content="DebuggerConnected event" /><meta name="Microsoft.Help.F1" content="Microsoft.ClearScript.V8.V8Runtime.DebuggerConnected" /><meta name="Microsoft.Help.F1" content="V8Runtime.DebuggerConnected" /><meta name="Microsoft.Help.F1" content="DebuggerConnected" /><meta name="container" content="Microsoft.ClearScript.V8" /><meta name="file" content="E_Microsoft_ClearScript_V8_V8Runtime_DebuggerConnected" /><meta name="guid" content="E_Microsoft_ClearScript_V8_V8Runtime_DebuggerConnected" /><meta name="Description" content="Occurs when a debugger connects to a V8 runtime." /><link rel="stylesheet" type="text/css" href="../styles/branding-Website.css" /><script type="text/javascript" src="../scripts/jquery-3.5.1.min.js"></script><script type="text/javascript" src="../scripts/branding-Website.js"></script><script type="text/javascript" src="../scripts/clipboard.min.js"></script></head><body onload="SetDefaultLanguage('cs');"><input type="hidden" id="userDataCache" class="userDataStyle" /><div id="PageHeader" class="pageHeader">ClearScript Library<form id="SearchForm" method="get" action="#" onsubmit="TransferToSearchPage(); return false;"><input id="SearchTextBox" type="text" maxlength="200" /><button id="SearchButton" type="submit"></button></form></div><div class="pageBody"><div class="leftNav" id="leftNav"><div id="tocNav"><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library" tocid="roottoc">ClearScript Library</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library Reference" tocid="R_Project_Reference">ClearScript Library Reference</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/N_Microsoft_ClearScript_V8.htm" title="Microsoft.ClearScript.V8" tocid="N_Microsoft_ClearScript_V8">Microsoft.ClearScript.V8</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/T_Microsoft_ClearScript_V8_V8Runtime.htm" title="V8Runtime Class" tocid="T_Microsoft_ClearScript_V8_V8Runtime">V8Runtime Class</a></div><div class="toclevel1" data-toclevel="1" data-childrenloaded="true"><a class="tocExpanded" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/Events_T_Microsoft_ClearScript_V8_V8Runtime.htm" title="V8Runtime Events" tocid="Events_T_Microsoft_ClearScript_V8_V8Runtime">V8Runtime Events</a></div><div class="toclevel2 current" data-toclevel="2"><a data-tochassubtree="false" href="../html/E_Microsoft_ClearScript_V8_V8Runtime_DebuggerConnected.htm" title="DebuggerConnected Event" tocid="E_Microsoft_ClearScript_V8_V8Runtime_DebuggerConnected">DebuggerConnected Event</a></div><div class="toclevel2" data-toclevel="2"><a data-tochassubtree="false" href="../html/E_Microsoft_ClearScript_V8_V8Runtime_DebuggerDisconnected.htm" title="DebuggerDisconnected Event" tocid="E_Microsoft_ClearScript_V8_V8Runtime_DebuggerDisconnected">DebuggerDisconnected Event</a></div></div><div id="tocResizableEW" onmousedown="OnMouseDown(event);"></div><div id="TocResize" class="tocResize"><img id="ResizeImageIncrease" src="../icons/TocOpen.gif" onclick="OnIncreaseToc()" alt="Click or drag to resize" title="Click or drag to resize" /><img id="ResizeImageReset" src="../icons/TocClose.gif" style="display:none" onclick="OnResetToc()" alt="Click or drag to resize" title="Click or drag to resize" /></div></div><div id="TopicContent" class="topicContent"><table class="titleTable"><tr><td class="titleColumn"><h1>V8Runtime<span id="LSTC4DB887C_0" data-languageSpecificText="cpp=::|nu=."></span>Debugger<wbr />Connected Event</h1></td></tr></table><div class="summary">
             Occurs when a debugger connects to a V8 runtime.
-            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript_V8.htm">Microsoft.ClearScript.V8</a><br /><strong>Assembly:</strong> ClearScript.V8 (in ClearScript.V8.dll) Version: 7.4.3<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> event <span class="identifier">EventHandler</span>&lt;<span class="identifier">V8RuntimeDebuggerEventArgs</span>&gt; <span class="identifier">DebuggerConnected</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> Event <span class="identifier">DebuggerConnected</span> <span class="keyword">As</span> <span class="identifier">EventHandler</span>(<span class="keyword">Of</span> <span class="identifier">V8RuntimeDebuggerEventArgs</span>)</pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
+            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript_V8.htm">Microsoft.ClearScript.V8</a><br /><strong>Assembly:</strong> ClearScript.V8 (in ClearScript.V8.dll) Version: 7.4.4<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> event <span class="identifier">EventHandler</span>&lt;<span class="identifier">V8RuntimeDebuggerEventArgs</span>&gt; <span class="identifier">DebuggerConnected</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> Event <span class="identifier">DebuggerConnected</span> <span class="keyword">As</span> <span class="identifier">EventHandler</span>(<span class="keyword">Of</span> <span class="identifier">V8RuntimeDebuggerEventArgs</span>)</pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
 <span class="keyword">static</span>  <span class="keyword">event</span> <span class="identifier">EventHandler</span>&lt;<span class="identifier">V8RuntimeDebuggerEventArgs</span>^&gt;^ <span class="identifier">DebuggerConnected</span> {
 	<span class="keyword">void</span> <span class="keyword">add</span> (<span class="identifier">EventHandler</span>&lt;<span class="identifier">V8RuntimeDebuggerEventArgs</span>^&gt;^ <span class="parameter">value</span>);
 	<span class="keyword">void</span> <span class="keyword">remove</span> (<span class="identifier">EventHandler</span>&lt;<span class="identifier">V8RuntimeDebuggerEventArgs</span>^&gt;^ <span class="parameter">value</span>);

docs/Reference/html/F_Microsoft_ClearScript_Undefined_Value.htm

@@ -1,6 +1,6 @@
 <html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="Microsoft.Help.SelfBranded" content="true" /><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Locale" content="en-us" /><meta name="Microsoft.Help.TopicLocale" content="en-us" /><link rel="shortcut icon" href="../icons/favicon.ico" /><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"></script><title>Undefined.Value Field</title><meta name="Title" content="Value Field" /><meta name="Microsoft.Help.Id" content="F:Microsoft.ClearScript.Undefined.Value" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="System.Keywords" content="Undefined.Value field" /><meta name="System.Keywords" content="Value field" /><meta name="Microsoft.Help.F1" content="Microsoft.ClearScript.Undefined.Value" /><meta name="Microsoft.Help.F1" content="Undefined.Value" /><meta name="Microsoft.Help.F1" content="Value" /><meta name="container" content="Microsoft.ClearScript" /><meta name="file" content="F_Microsoft_ClearScript_Undefined_Value" /><meta name="guid" content="F_Microsoft_ClearScript_Undefined_Value" /><meta name="Description" content="The sole instance of the class." /><link rel="stylesheet" type="text/css" href="../styles/branding-Website.css" /><script type="text/javascript" src="../scripts/jquery-3.5.1.min.js"></script><script type="text/javascript" src="../scripts/branding-Website.js"></script><script type="text/javascript" src="../scripts/clipboard.min.js"></script></head><body onload="SetDefaultLanguage('cs');"><input type="hidden" id="userDataCache" class="userDataStyle" /><div id="PageHeader" class="pageHeader">ClearScript Library<form id="SearchForm" method="get" action="#" onsubmit="TransferToSearchPage(); return false;"><input id="SearchTextBox" type="text" maxlength="200" /><button id="SearchButton" type="submit"></button></form></div><div class="pageBody"><div class="leftNav" id="leftNav"><div id="tocNav"><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library" tocid="roottoc">ClearScript Library</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library Reference" tocid="R_Project_Reference">ClearScript Library Reference</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/N_Microsoft_ClearScript.htm" title="Microsoft.ClearScript" tocid="N_Microsoft_ClearScript">Microsoft.ClearScript</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/T_Microsoft_ClearScript_Undefined.htm" title="Undefined Class" tocid="T_Microsoft_ClearScript_Undefined">Undefined Class</a></div><div class="toclevel1" data-toclevel="1" data-childrenloaded="true"><a class="tocExpanded" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/Fields_T_Microsoft_ClearScript_Undefined.htm" title="Undefined Fields" tocid="Fields_T_Microsoft_ClearScript_Undefined">Undefined Fields</a></div><div class="toclevel2 current" data-toclevel="2"><a data-tochassubtree="false" href="../html/F_Microsoft_ClearScript_Undefined_Value.htm" title="Value Field" tocid="F_Microsoft_ClearScript_Undefined_Value">Value Field</a></div></div><div id="tocResizableEW" onmousedown="OnMouseDown(event);"></div><div id="TocResize" class="tocResize"><img id="ResizeImageIncrease" src="../icons/TocOpen.gif" onclick="OnIncreaseToc()" alt="Click or drag to resize" title="Click or drag to resize" /><img id="ResizeImageReset" src="../icons/TocClose.gif" style="display:none" onclick="OnResetToc()" alt="Click or drag to resize" title="Click or drag to resize" /></div></div><div id="TopicContent" class="topicContent"><table class="titleTable"><tr><td class="titleColumn"><h1>Undefined<span id="LST300E21CC_0" data-languageSpecificText="cpp=::|nu=."></span>Value Field</h1></td></tr></table><div class="summary">
             The sole instance of the <span class="code"><a href="T_Microsoft_ClearScript_Undefined.htm">Undefined</a></span> class.
-            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript</a><br /><strong>Assembly:</strong> ClearScript.Core (in ClearScript.Core.dll) Version: 7.4.3<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">readonly</span> <span class="identifier">Undefined</span> <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">ReadOnly</span> <span class="identifier">Value</span> <span class="keyword">As</span> <span class="identifier">Undefined</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
+            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript</a><br /><strong>Assembly:</strong> ClearScript.Core (in ClearScript.Core.dll) Version: 7.4.4<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">readonly</span> <span class="identifier">Undefined</span> <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">ReadOnly</span> <span class="identifier">Value</span> <span class="keyword">As</span> <span class="identifier">Undefined</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
 <span class="keyword">static</span> <span class="keyword">initonly</span> <span class="identifier">Undefined</span>^ <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div4" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">static</span> <span class="keyword">val</span> <span class="identifier">Value</span>: <span class="identifier">Undefined</span></pre></div></div></div><h4>Field Value</h4><a href="T_Microsoft_ClearScript_Undefined.htm">Undefined</a></div><div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('seeAlso')" onkeypress="SectionExpandCollapse_CheckKey('seeAlso', event)" tabindex="0"><img id="seeAlsoToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />See Also</span></div><div id="seeAlsoSection" class="collapsibleSection"><h4>Reference</h4><div><a href="T_Microsoft_ClearScript_Undefined.htm">Undefined Class</a></div><div><a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript Namespace</a></div></div></div></div><div id="PageFooter" class="pageFooter"><p>Copyright © Microsoft Corporation. All rights reserved.</p><div class="feedbackLink">Send comments on this topic to
         <a id="HT_MailLink" href="mailto:ClearScript%40microsoft.com?Subject=ClearScript%20Library">Microsoft</a></div>
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docs/Reference/html/F_Microsoft_ClearScript_ValueRef_1_Value.htm

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 <html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="Microsoft.Help.SelfBranded" content="true" /><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Locale" content="en-us" /><meta name="Microsoft.Help.TopicLocale" content="en-us" /><link rel="shortcut icon" href="../icons/favicon.ico" /><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"></script><title>ValueRef&lt;T&gt;.Value Field</title><meta name="Title" content="Value Field" /><meta name="Microsoft.Help.Id" content="F:Microsoft.ClearScript.ValueRef`1.Value" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="System.Keywords" content="ValueRef&lt;T&gt;.Value field" /><meta name="System.Keywords" content="Value field" /><meta name="Microsoft.Help.F1" content="Microsoft.ClearScript.ValueRef`1.Value" /><meta name="Microsoft.Help.F1" content="ValueRef`1.Value" /><meta name="Microsoft.Help.F1" content="Value" /><meta name="container" content="Microsoft.ClearScript" /><meta name="file" content="F_Microsoft_ClearScript_ValueRef_1_Value" /><meta name="guid" content="F_Microsoft_ClearScript_ValueRef_1_Value" /><meta name="Description" content="The value currently held by the instance." /><link rel="stylesheet" type="text/css" href="../styles/branding-Website.css" /><script type="text/javascript" src="../scripts/jquery-3.5.1.min.js"></script><script type="text/javascript" src="../scripts/branding-Website.js"></script><script type="text/javascript" src="../scripts/clipboard.min.js"></script></head><body onload="SetDefaultLanguage('cs');"><input type="hidden" id="userDataCache" class="userDataStyle" /><div id="PageHeader" class="pageHeader">ClearScript Library<form id="SearchForm" method="get" action="#" onsubmit="TransferToSearchPage(); return false;"><input id="SearchTextBox" type="text" maxlength="200" /><button id="SearchButton" type="submit"></button></form></div><div class="pageBody"><div class="leftNav" id="leftNav"><div id="tocNav"><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library" tocid="roottoc">ClearScript Library</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library Reference" tocid="R_Project_Reference">ClearScript Library Reference</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/N_Microsoft_ClearScript.htm" title="Microsoft.ClearScript" tocid="N_Microsoft_ClearScript">Microsoft.ClearScript</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/T_Microsoft_ClearScript_ValueRef_1.htm" title="ValueRef&lt;T&gt; Class" tocid="T_Microsoft_ClearScript_ValueRef_1">ValueRef&lt;T&gt; Class</a></div><div class="toclevel1" data-toclevel="1" data-childrenloaded="true"><a class="tocExpanded" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/Fields_T_Microsoft_ClearScript_ValueRef_1.htm" title="ValueRef&lt;T&gt; Fields" tocid="Fields_T_Microsoft_ClearScript_ValueRef_1">ValueRef&lt;T&gt; Fields</a></div><div class="toclevel2 current" data-toclevel="2"><a data-tochassubtree="false" href="../html/F_Microsoft_ClearScript_ValueRef_1_Value.htm" title="Value Field" tocid="F_Microsoft_ClearScript_ValueRef_1_Value">Value Field</a></div></div><div id="tocResizableEW" onmousedown="OnMouseDown(event);"></div><div id="TocResize" class="tocResize"><img id="ResizeImageIncrease" src="../icons/TocOpen.gif" onclick="OnIncreaseToc()" alt="Click or drag to resize" title="Click or drag to resize" /><img id="ResizeImageReset" src="../icons/TocClose.gif" style="display:none" onclick="OnResetToc()" alt="Click or drag to resize" title="Click or drag to resize" /></div></div><div id="TopicContent" class="topicContent"><table class="titleTable"><tr><td class="titleColumn"><h1>Value<wbr />Ref<span id="LST84C254E1_0" data-languageSpecificText="cpp=&lt;|cs=&lt;|fs=&lt;|vb=(Of |nu=("></span><span class="typeparameter">T</span><span id="LST84C254E1_1" data-languageSpecificText="cpp=&gt;|cs=&gt;|fs=&gt;|vb=)|nu=)"></span><span id="LST84C254E1_2" data-languageSpecificText="cpp=::|nu=."></span>Value Field</h1></td></tr></table><div class="summary">
             The value currently held by the <span class="code"><a href="T_Microsoft_ClearScript_ValueRef_1.htm">ValueRef<span id="LST84C254E1_3" data-languageSpecificText="cs=&lt;|vb=(Of |cpp=&lt;|nu=(|fs=&lt;'"></span>T<span id="LST84C254E1_4" data-languageSpecificText="cs=&gt;|vb=)|cpp=&gt;|nu=)|fs=&gt;"></span></a></span> instance.
-            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript</a><br /><strong>Assembly:</strong> ClearScript.Core (in ClearScript.Core.dll) Version: 7.4.3<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> T <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="identifier">Value</span> <span class="keyword">As</span> T</pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
+            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript</a><br /><strong>Assembly:</strong> ClearScript.Core (in ClearScript.Core.dll) Version: 7.4.4<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> T <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="identifier">Value</span> <span class="keyword">As</span> T</pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
 T <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div4" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">val</span> <span class="keyword">mutable</span> <span class="identifier">Value</span>: 'T</pre></div></div></div><h4>Field Value</h4><a href="T_Microsoft_ClearScript_ValueRef_1.htm"><span class="typeparameter">T</span></a></div><div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('seeAlso')" onkeypress="SectionExpandCollapse_CheckKey('seeAlso', event)" tabindex="0"><img id="seeAlsoToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />See Also</span></div><div id="seeAlsoSection" class="collapsibleSection"><h4>Reference</h4><div><a href="T_Microsoft_ClearScript_ValueRef_1.htm">ValueRef<span id="LST84C254E1_5" data-languageSpecificText="cs=&lt;|vb=(Of |cpp=&lt;|nu=(|fs=&lt;'"></span>T<span id="LST84C254E1_6" data-languageSpecificText="cs=&gt;|vb=)|cpp=&gt;|nu=)|fs=&gt;"></span> Class</a></div><div><a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript Namespace</a></div></div></div></div><div id="PageFooter" class="pageFooter"><p>Copyright © Microsoft Corporation. All rights reserved.</p><div class="feedbackLink">Send comments on this topic to
         <a id="HT_MailLink" href="mailto:ClearScript%40microsoft.com?Subject=ClearScript%20Library">Microsoft</a></div>
         <script type="text/javascript">

docs/Reference/html/F_Microsoft_ClearScript_VoidResult_Value.htm

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 <html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="Microsoft.Help.SelfBranded" content="true" /><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Locale" content="en-us" /><meta name="Microsoft.Help.TopicLocale" content="en-us" /><link rel="shortcut icon" href="../icons/favicon.ico" /><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"></script><title>VoidResult.Value Field</title><meta name="Title" content="Value Field" /><meta name="Microsoft.Help.Id" content="F:Microsoft.ClearScript.VoidResult.Value" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="System.Keywords" content="VoidResult.Value field" /><meta name="System.Keywords" content="Value field" /><meta name="Microsoft.Help.F1" content="Microsoft.ClearScript.VoidResult.Value" /><meta name="Microsoft.Help.F1" content="VoidResult.Value" /><meta name="Microsoft.Help.F1" content="Value" /><meta name="container" content="Microsoft.ClearScript" /><meta name="file" content="F_Microsoft_ClearScript_VoidResult_Value" /><meta name="guid" content="F_Microsoft_ClearScript_VoidResult_Value" /><meta name="Description" content="The sole instance of the class." /><link rel="stylesheet" type="text/css" href="../styles/branding-Website.css" /><script type="text/javascript" src="../scripts/jquery-3.5.1.min.js"></script><script type="text/javascript" src="../scripts/branding-Website.js"></script><script type="text/javascript" src="../scripts/clipboard.min.js"></script></head><body onload="SetDefaultLanguage('cs');"><input type="hidden" id="userDataCache" class="userDataStyle" /><div id="PageHeader" class="pageHeader">ClearScript Library<form id="SearchForm" method="get" action="#" onsubmit="TransferToSearchPage(); return false;"><input id="SearchTextBox" type="text" maxlength="200" /><button id="SearchButton" type="submit"></button></form></div><div class="pageBody"><div class="leftNav" id="leftNav"><div id="tocNav"><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library" tocid="roottoc">ClearScript Library</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library Reference" tocid="R_Project_Reference">ClearScript Library Reference</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/N_Microsoft_ClearScript.htm" title="Microsoft.ClearScript" tocid="N_Microsoft_ClearScript">Microsoft.ClearScript</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/T_Microsoft_ClearScript_VoidResult.htm" title="VoidResult Class" tocid="T_Microsoft_ClearScript_VoidResult">VoidResult Class</a></div><div class="toclevel1" data-toclevel="1" data-childrenloaded="true"><a class="tocExpanded" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/Fields_T_Microsoft_ClearScript_VoidResult.htm" title="VoidResult Fields" tocid="Fields_T_Microsoft_ClearScript_VoidResult">VoidResult Fields</a></div><div class="toclevel2 current" data-toclevel="2"><a data-tochassubtree="false" href="../html/F_Microsoft_ClearScript_VoidResult_Value.htm" title="Value Field" tocid="F_Microsoft_ClearScript_VoidResult_Value">Value Field</a></div></div><div id="tocResizableEW" onmousedown="OnMouseDown(event);"></div><div id="TocResize" class="tocResize"><img id="ResizeImageIncrease" src="../icons/TocOpen.gif" onclick="OnIncreaseToc()" alt="Click or drag to resize" title="Click or drag to resize" /><img id="ResizeImageReset" src="../icons/TocClose.gif" style="display:none" onclick="OnResetToc()" alt="Click or drag to resize" title="Click or drag to resize" /></div></div><div id="TopicContent" class="topicContent"><table class="titleTable"><tr><td class="titleColumn"><h1>Void<wbr />Result<span id="LST48349C76_0" data-languageSpecificText="cpp=::|nu=."></span>Value Field</h1></td></tr></table><div class="summary">
             The sole instance of the <span class="code"><a href="T_Microsoft_ClearScript_VoidResult.htm">VoidResult</a></span> class.
-            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript</a><br /><strong>Assembly:</strong> ClearScript.Core (in ClearScript.Core.dll) Version: 7.4.3<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">readonly</span> <span class="identifier">VoidResult</span> <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">ReadOnly</span> <span class="identifier">Value</span> <span class="keyword">As</span> <span class="identifier">VoidResult</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
+            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript</a><br /><strong>Assembly:</strong> ClearScript.Core (in ClearScript.Core.dll) Version: 7.4.4<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">readonly</span> <span class="identifier">VoidResult</span> <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">ReadOnly</span> <span class="identifier">Value</span> <span class="keyword">As</span> <span class="identifier">VoidResult</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
 <span class="keyword">static</span> <span class="keyword">initonly</span> <span class="identifier">VoidResult</span>^ <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div4" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">static</span> <span class="keyword">val</span> <span class="identifier">Value</span>: <span class="identifier">VoidResult</span></pre></div></div></div><h4>Field Value</h4><a href="T_Microsoft_ClearScript_VoidResult.htm">VoidResult</a></div><div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('seeAlso')" onkeypress="SectionExpandCollapse_CheckKey('seeAlso', event)" tabindex="0"><img id="seeAlsoToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />See Also</span></div><div id="seeAlsoSection" class="collapsibleSection"><h4>Reference</h4><div><a href="T_Microsoft_ClearScript_VoidResult.htm">VoidResult Class</a></div><div><a href="N_Microsoft_ClearScript.htm">Microsoft.ClearScript Namespace</a></div></div></div></div><div id="PageFooter" class="pageFooter"><p>Copyright © Microsoft Corporation. All rights reserved.</p><div class="feedbackLink">Send comments on this topic to
         <a id="HT_MailLink" href="mailto:ClearScript%40microsoft.com?Subject=ClearScript%20Library">Microsoft</a></div>
         <script type="text/javascript">

docs/Reference/html/F_Microsoft_ClearScript_Windows_Core_NullSyncInvoker_Instance.htm

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 <html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="Microsoft.Help.SelfBranded" content="true" /><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Locale" content="en-us" /><meta name="Microsoft.Help.TopicLocale" content="en-us" /><link rel="shortcut icon" href="../icons/favicon.ico" /><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"></script><title>NullSyncInvoker.Instance Field</title><meta name="Title" content="Instance Field" /><meta name="Microsoft.Help.Id" content="F:Microsoft.ClearScript.Windows.Core.NullSyncInvoker.Instance" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="System.Keywords" content="NullSyncInvoker.Instance field" /><meta name="System.Keywords" content="Instance field" /><meta name="Microsoft.Help.F1" content="Microsoft.ClearScript.Windows.Core.NullSyncInvoker.Instance" /><meta name="Microsoft.Help.F1" content="NullSyncInvoker.Instance" /><meta name="Microsoft.Help.F1" content="Instance" /><meta name="container" content="Microsoft.ClearScript.Windows.Core" /><meta name="file" content="F_Microsoft_ClearScript_Windows_Core_NullSyncInvoker_Instance" /><meta name="guid" content="F_Microsoft_ClearScript_Windows_Core_NullSyncInvoker_Instance" /><meta name="Description" content="The sole instance of the class." /><link rel="stylesheet" type="text/css" href="../styles/branding-Website.css" /><script type="text/javascript" src="../scripts/jquery-3.5.1.min.js"></script><script type="text/javascript" src="../scripts/branding-Website.js"></script><script type="text/javascript" src="../scripts/clipboard.min.js"></script></head><body onload="SetDefaultLanguage('cs');"><input type="hidden" id="userDataCache" class="userDataStyle" /><div id="PageHeader" class="pageHeader">ClearScript Library<form id="SearchForm" method="get" action="#" onsubmit="TransferToSearchPage(); return false;"><input id="SearchTextBox" type="text" maxlength="200" /><button id="SearchButton" type="submit"></button></form></div><div class="pageBody"><div class="leftNav" id="leftNav"><div id="tocNav"><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library" tocid="roottoc">ClearScript Library</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library Reference" tocid="R_Project_Reference">ClearScript Library Reference</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/N_Microsoft_ClearScript_Windows_Core.htm" title="Microsoft.ClearScript.Windows.Core" tocid="N_Microsoft_ClearScript_Windows_Core">Microsoft.ClearScript.Windows.Core</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/T_Microsoft_ClearScript_Windows_Core_NullSyncInvoker.htm" title="NullSyncInvoker Class" tocid="T_Microsoft_ClearScript_Windows_Core_NullSyncInvoker">NullSyncInvoker Class</a></div><div class="toclevel1" data-toclevel="1" data-childrenloaded="true"><a class="tocExpanded" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/Fields_T_Microsoft_ClearScript_Windows_Core_NullSyncInvoker.htm" title="NullSyncInvoker Fields" tocid="Fields_T_Microsoft_ClearScript_Windows_Core_NullSyncInvoker">NullSyncInvoker Fields</a></div><div class="toclevel2 current" data-toclevel="2"><a data-tochassubtree="false" href="../html/F_Microsoft_ClearScript_Windows_Core_NullSyncInvoker_Instance.htm" title="Instance Field" tocid="F_Microsoft_ClearScript_Windows_Core_NullSyncInvoker_Instance">Instance Field</a></div></div><div id="tocResizableEW" onmousedown="OnMouseDown(event);"></div><div id="TocResize" class="tocResize"><img id="ResizeImageIncrease" src="../icons/TocOpen.gif" onclick="OnIncreaseToc()" alt="Click or drag to resize" title="Click or drag to resize" /><img id="ResizeImageReset" src="../icons/TocClose.gif" style="display:none" onclick="OnResetToc()" alt="Click or drag to resize" title="Click or drag to resize" /></div></div><div id="TopicContent" class="topicContent"><table class="titleTable"><tr><td class="titleColumn"><h1>Null<wbr />Sync<wbr />Invoker<span id="LSTC6585049_0" data-languageSpecificText="cpp=::|nu=."></span>Instance Field</h1></td></tr></table><div class="summary">
             The sole instance of the <span class="code"><a href="T_Microsoft_ClearScript_Windows_Core_NullSyncInvoker.htm">NullSyncInvoker</a></span> class.
-            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript_Windows_Core.htm">Microsoft.ClearScript.Windows.Core</a><br /><strong>Assembly:</strong> ClearScript.Windows.Core (in ClearScript.Windows.Core.dll) Version: 7.4.3<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">readonly</span> <span class="identifier">ISyncInvoker</span> <span class="identifier">Instance</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">ReadOnly</span> <span class="identifier">Instance</span> <span class="keyword">As</span> <span class="identifier">ISyncInvoker</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
+            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript_Windows_Core.htm">Microsoft.ClearScript.Windows.Core</a><br /><strong>Assembly:</strong> ClearScript.Windows.Core (in ClearScript.Windows.Core.dll) Version: 7.4.4<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">readonly</span> <span class="identifier">ISyncInvoker</span> <span class="identifier">Instance</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">ReadOnly</span> <span class="identifier">Instance</span> <span class="keyword">As</span> <span class="identifier">ISyncInvoker</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
 <span class="keyword">static</span> <span class="keyword">initonly</span> <span class="identifier">ISyncInvoker</span>^ <span class="identifier">Instance</span></pre></div><div id="IDAB_code_Div4" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">static</span> <span class="keyword">val</span> <span class="identifier">Instance</span>: <span class="identifier">ISyncInvoker</span></pre></div></div></div><h4>Field Value</h4><a href="T_Microsoft_ClearScript_Windows_Core_ISyncInvoker.htm">ISyncInvoker</a></div><div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('seeAlso')" onkeypress="SectionExpandCollapse_CheckKey('seeAlso', event)" tabindex="0"><img id="seeAlsoToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />See Also</span></div><div id="seeAlsoSection" class="collapsibleSection"><h4>Reference</h4><div><a href="T_Microsoft_ClearScript_Windows_Core_NullSyncInvoker.htm">NullSyncInvoker Class</a></div><div><a href="N_Microsoft_ClearScript_Windows_Core.htm">Microsoft.ClearScript.Windows.Core Namespace</a></div></div></div></div><div id="PageFooter" class="pageFooter"><p>Copyright © Microsoft Corporation. All rights reserved.</p><div class="feedbackLink">Send comments on this topic to
         <a id="HT_MailLink" href="mailto:ClearScript%40microsoft.com?Subject=ClearScript%20Library">Microsoft</a></div>
         <script type="text/javascript">

docs/Reference/html/F_Microsoft_ClearScript_Windows_Nothing_Value.htm

@@ -1,6 +1,6 @@
 <html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="Microsoft.Help.SelfBranded" content="true" /><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Locale" content="en-us" /><meta name="Microsoft.Help.TopicLocale" content="en-us" /><link rel="shortcut icon" href="../icons/favicon.ico" /><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"></script><title>Nothing.Value Field</title><meta name="Title" content="Value Field" /><meta name="Microsoft.Help.Id" content="F:Microsoft.ClearScript.Windows.Nothing.Value" /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="System.Keywords" content="Nothing.Value field" /><meta name="System.Keywords" content="Value field" /><meta name="Microsoft.Help.F1" content="Microsoft.ClearScript.Windows.Nothing.Value" /><meta name="Microsoft.Help.F1" content="Nothing.Value" /><meta name="Microsoft.Help.F1" content="Value" /><meta name="container" content="Microsoft.ClearScript.Windows" /><meta name="file" content="F_Microsoft_ClearScript_Windows_Nothing_Value" /><meta name="guid" content="F_Microsoft_ClearScript_Windows_Nothing_Value" /><meta name="Description" content="The sole instance of the class." /><link rel="stylesheet" type="text/css" href="../styles/branding-Website.css" /><script type="text/javascript" src="../scripts/jquery-3.5.1.min.js"></script><script type="text/javascript" src="../scripts/branding-Website.js"></script><script type="text/javascript" src="../scripts/clipboard.min.js"></script></head><body onload="SetDefaultLanguage('cs');"><input type="hidden" id="userDataCache" class="userDataStyle" /><div id="PageHeader" class="pageHeader">ClearScript Library<form id="SearchForm" method="get" action="#" onsubmit="TransferToSearchPage(); return false;"><input id="SearchTextBox" type="text" maxlength="200" /><button id="SearchButton" type="submit"></button></form></div><div class="pageBody"><div class="leftNav" id="leftNav"><div id="tocNav"><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library" tocid="roottoc">ClearScript Library</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/R_Project_Reference.htm" title="ClearScript Library Reference" tocid="R_Project_Reference">ClearScript Library Reference</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/N_Microsoft_ClearScript_Windows.htm" title="Microsoft.ClearScript.Windows" tocid="N_Microsoft_ClearScript_Windows">Microsoft.ClearScript.Windows</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/T_Microsoft_ClearScript_Windows_Nothing.htm" title="Nothing Class" tocid="T_Microsoft_ClearScript_Windows_Nothing">Nothing Class</a></div><div class="toclevel1" data-toclevel="1" data-childrenloaded="true"><a class="tocExpanded" onclick="Toggle(this);" href="#!" /><a data-tochassubtree="true" href="../html/Fields_T_Microsoft_ClearScript_Windows_Nothing.htm" title="Nothing Fields" tocid="Fields_T_Microsoft_ClearScript_Windows_Nothing">Nothing Fields</a></div><div class="toclevel2 current" data-toclevel="2"><a data-tochassubtree="false" href="../html/F_Microsoft_ClearScript_Windows_Nothing_Value.htm" title="Value Field" tocid="F_Microsoft_ClearScript_Windows_Nothing_Value">Value Field</a></div></div><div id="tocResizableEW" onmousedown="OnMouseDown(event);"></div><div id="TocResize" class="tocResize"><img id="ResizeImageIncrease" src="../icons/TocOpen.gif" onclick="OnIncreaseToc()" alt="Click or drag to resize" title="Click or drag to resize" /><img id="ResizeImageReset" src="../icons/TocClose.gif" style="display:none" onclick="OnResetToc()" alt="Click or drag to resize" title="Click or drag to resize" /></div></div><div id="TopicContent" class="topicContent"><table class="titleTable"><tr><td class="titleColumn"><h1>Nothing<span id="LST4ACEDED7_0" data-languageSpecificText="cpp=::|nu=."></span>Value Field</h1></td></tr></table><div class="summary">
             The sole instance of the <span class="code"><a href="T_Microsoft_ClearScript_Windows_Nothing.htm">Nothing</a></span> class.
-            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript_Windows.htm">Microsoft.ClearScript.Windows</a><br /><strong>Assembly:</strong> ClearScript.Windows.Core (in ClearScript.Windows.Core.dll) Version: 7.4.3<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">readonly</span> <span class="identifier">Nothing</span> <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">ReadOnly</span> <span class="identifier">Value</span> <span class="keyword">As</span> <span class="identifier">Nothing</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
+            </div><br /><strong>Namespace:</strong> <a href="N_Microsoft_ClearScript_Windows.htm">Microsoft.ClearScript.Windows</a><br /><strong>Assembly:</strong> ClearScript.Windows.Core (in ClearScript.Windows.Core.dll) Version: 7.4.4<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('IDB')" onkeypress="SectionExpandCollapse_CheckKey('IDB', event)" tabindex="0"><img id="IDBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="IDBSection" class="collapsibleSection"><div id="IDAB" class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="IDAB_tab1" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cs','1','4');return false;">C#</a></div><div id="IDAB_tab2" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','vb','2','4');return false;">VB</a></div><div id="IDAB_tab3" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','cpp','3','4');return false;">C++</a></div><div id="IDAB_tab4" class="codeSnippetContainerTab"><a href="#" onclick="ChangeTab('IDAB','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="IDAB_copyCode" href="#" class="copyCodeSnippet" onclick="CopyToClipboard('IDAB');return false;" title="Copy">Copy</a></div></div><div id="IDAB_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">readonly</span> <span class="identifier">Nothing</span> <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">ReadOnly</span> <span class="identifier">Value</span> <span class="keyword">As</span> <span class="identifier">Nothing</span></pre></div><div id="IDAB_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
 <span class="keyword">static</span> <span class="keyword">initonly</span> <span class="identifier">Nothing</span>^ <span class="identifier">Value</span></pre></div><div id="IDAB_code_Div4" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">static</span> <span class="keyword">val</span> <span class="identifier">Value</span>: <span class="identifier">Nothing</span></pre></div></div></div><h4>Field Value</h4><a href="T_Microsoft_ClearScript_Windows_Nothing.htm">Nothing</a></div><div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('seeAlso')" onkeypress="SectionExpandCollapse_CheckKey('seeAlso', event)" tabindex="0"><img id="seeAlsoToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />See Also</span></div><div id="seeAlsoSection" class="collapsibleSection"><h4>Reference</h4><div><a href="T_Microsoft_ClearScript_Windows_Nothing.htm">Nothing Class</a></div><div><a href="N_Microsoft_ClearScript_Windows.htm">Microsoft.ClearScript.Windows Namespace</a></div></div></div></div><div id="PageFooter" class="pageFooter"><p>Copyright © Microsoft Corporation. All rights reserved.</p><div class="feedbackLink">Send comments on this topic to
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