bug fixes for release mode

Microsoft.Toolkit.Uwp.SampleApp/Models/Sample.cs

@@ -193,9 +193,15 @@ namespace Microsoft.Toolkit.Uwp.SampleApp
             }
 
 #if !DEBUG // don't cache for debugging perpuses so it always gets the latests
-            if (string.IsNullOrWhiteSpace(_cachedDocumentation) && StorageFileHelper.IsFileNameValid(filename))
+            if (string.IsNullOrWhiteSpace(_cachedDocumentation))
             {
-                _cachedDocumentation = await StorageFileHelper.ReadTextFromLocalCacheFileAsync(filename);
+                try
+                {
+                    _cachedDocumentation = await StorageFileHelper.ReadTextFromLocalCacheFileAsync(filename);
+                }
+                catch (Exception)
+                {
+                }
             }
 #endif
 

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/samples.json

@@ -595,7 +595,7 @@
         "XamlCodeFile": "SurfaceDialTextboxCode.bind",
         "Icon": "/SamplePages/SurfaceDialTextbox/SurfaceDialTextbox.png",
         "BadgeUpdateVersionRequired": "Anniversary Update required",
-        "DocumentationUrl": "https://raw.githubusercontent.com/Microsoft/UWPCommunityToolkit/dev/docs/extensions/SurfaceDialTextbox.md"
+        "DocumentationUrl": "https://raw.githubusercontent.com/Microsoft/UWPCommunityToolkit/dev/docs/extensions/SurfaceDialTextboxHelper.md"
       }
     ]
   },

Microsoft.Toolkit.Uwp.UI.Controls/TextToolbar/Symbols/Symbol.cs

@@ -53,10 +53,22 @@ namespace Microsoft.Toolkit.Uwp.UI.Controls.TextToolbarSymbols
 
         ~Symbol()
         {
-            Dispatcher?.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
+            try
             {
-                isEnabledWatcher?.Dispose();
-            });
+                Dispatcher?.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
+                {
+                    try
+                    {
+                        isEnabledWatcher?.Dispose();
+                    }
+                    catch (System.Exception)
+                    {
+                    }
+                });
+            }
+            catch (System.Exception)
+            {
+            }
         }
     }
 }

Microsoft.Toolkit.Uwp.UI/Extensions/Tree/LogicalTree.cs

@@ -250,7 +250,7 @@ namespace Microsoft.Toolkit.Uwp.UI.Extensions
             var contentpropname = ContentPropertySearch(element.GetType());
             if (contentpropname != null)
             {
-                return element.GetType().GetProperty(contentpropname).GetValue(element) as UIElement;
+                return element.GetType()?.GetProperty(contentpropname)?.GetValue(element) as UIElement;
             }
 
             return null;