Resolved Nullable

src/CommunityToolkit/Xamarin.CommunityToolkit/Helpers/DelegateWeakEventManager.shared.cs

@@ -26,7 +26,9 @@ namespace Xamarin.CommunityToolkit.Helpers
 			if (handler == null)
 				throw new ArgumentNullException(nameof(handler));
 
-			EventManagerService.AddEventHandler(eventName, handler.Target, handler.GetMethodInfo(), eventHandlers);
+			var methodInfo = handler.GetMethodInfo() ?? throw new NullReferenceException("Could not locate MethodInfo");
+
+			EventManagerService.AddEventHandler(eventName, handler.Target, methodInfo, eventHandlers);
 		}
 
 		/// <summary>
@@ -42,7 +44,9 @@ namespace Xamarin.CommunityToolkit.Helpers
 			if (handler == null)
 				throw new ArgumentNullException(nameof(handler));
 
-			EventManagerService.RemoveEventHandler(eventName, handler.Target, handler.GetMethodInfo(), eventHandlers);
+			var methodInfo = handler.GetMethodInfo() ?? throw new NullReferenceException("Could not locate MethodInfo");
+
+			EventManagerService.RemoveEventHandler(eventName, handler.Target, methodInfo, eventHandlers);
 		}
 
 		/// <summary>

src/CommunityToolkit/Xamarin.CommunityToolkit/Helpers/WeakEventManager.shared.cs

@@ -29,7 +29,9 @@ namespace Xamarin.CommunityToolkit.Helpers
 			if (handler == null)
 				throw new ArgumentNullException(nameof(handler));
 
-			EventManagerService.AddEventHandler(eventName, handler.Target, handler.GetMethodInfo(), eventHandlers);
+			var methodInfo = handler.GetMethodInfo() ?? throw new NullReferenceException("Could not locate MethodInfo");
+
+			EventManagerService.AddEventHandler(eventName, handler.Target, methodInfo, eventHandlers);
 		}
 
 		/// <summary>
@@ -45,7 +47,9 @@ namespace Xamarin.CommunityToolkit.Helpers
 			if (action == null)
 				throw new ArgumentNullException(nameof(action));
 
-			EventManagerService.AddEventHandler(eventName, action.Target, action.GetMethodInfo(), eventHandlers);
+			var methodInfo = action.GetMethodInfo() ?? throw new NullReferenceException("Could not locate MethodInfo");
+
+			EventManagerService.AddEventHandler(eventName, action.Target, methodInfo, eventHandlers);
 		}
 
 		/// <summary>
@@ -61,7 +65,9 @@ namespace Xamarin.CommunityToolkit.Helpers
 			if (handler == null)
 				throw new ArgumentNullException(nameof(handler));
 
-			EventManagerService.RemoveEventHandler(eventName, handler.Target, handler.GetMethodInfo(), eventHandlers);
+			var methodInfo = handler.GetMethodInfo() ?? throw new NullReferenceException("Could not locate MethodInfo");
+
+			EventManagerService.RemoveEventHandler(eventName, handler.Target, methodInfo, eventHandlers);
 		}
 
 		/// <summary>
@@ -77,7 +83,9 @@ namespace Xamarin.CommunityToolkit.Helpers
 			if (action == null)
 				throw new ArgumentNullException(nameof(action));
 
-			EventManagerService.RemoveEventHandler(eventName, action.Target, action.GetMethodInfo(), eventHandlers);
+			var methodInfo = action.GetMethodInfo() ?? throw new NullReferenceException("Could not locate MethodInfo");
+
+			EventManagerService.RemoveEventHandler(eventName, action.Target, methodInfo, eventHandlers);
 		}
 
 		/// <summary>
@@ -113,11 +121,15 @@ namespace Xamarin.CommunityToolkit.Helpers
 			EventManagerService.HandleEvent(eventName, eventArgs, eventHandlers);
 	}
 
+	/// <summary>
+	/// Extensions for Xamarin.Forms.WeakEventManager
+	/// </summary>
 	public static class WeakEventManagerExtensions
 	{
 		/// <summary>
 		/// Invokes the event EventHandler
 		/// </summary>
+		/// <param name="weakEventManager">WeakEventManager</param>
 		/// <param name="sender">Sender</param>
 		/// <param name="eventArgs">Event arguments</param>
 		/// <param name="eventName">Event name</param>

src/CommunityToolkit/Xamarin.CommunityToolkit/Helpers/WeakEventManagerService.shared.cs

@@ -165,7 +165,7 @@ namespace Xamarin.CommunityToolkit.Helpers
 			var typeRTDynamicMethod = typeInfoRTDynamicMethod?.AsType();
 
 			if (typeInfoRTDynamicMethod != null && typeInfoRTDynamicMethod.IsAssignableFrom(rtDynamicMethod.GetType().GetTypeInfo()))
-				return (DynamicMethod?)typeRTDynamicMethod.GetRuntimeFields()?.FirstOrDefault(f => f.Name is "m_owner")?.GetValue(rtDynamicMethod);
+				return (DynamicMethod?)typeRTDynamicMethod?.GetRuntimeFields()?.FirstOrDefault(f => f?.Name is "m_owner")?.GetValue(rtDynamicMethod);
 			else
 				return null;
 		}

src/CommunityToolkit/Xamarin.CommunityToolkit/ObjectModel/Extensions/INotifyPropertyChangedExtension.shared.cs

@@ -18,7 +18,7 @@ namespace Xamarin.CommunityToolkit.ObjectModel.Extensions
 
 			void handler(object? sender, PropertyChangedEventArgs e)
 			{
-				var s = (T)weakSubscriber.Target;
+				var s = (T?)weakSubscriber.Target;
 				if (s == null)
 				{
 					target.PropertyChanged -= handler;

src/CommunityToolkit/Xamarin.CommunityToolkit/Views/TabView/TabView.shared.cs

@@ -466,7 +466,7 @@ namespace Xamarin.CommunityToolkit.UI.Views
 				foreach (var newTabViewItem in e.NewItems)
 				{
 					if (newTabViewItem is TabViewItem tabViewItem)
-						AddTabViewItem(tabViewItem, TabItems.IndexOf(newTabViewItem));
+						AddTabViewItem(tabViewItem, TabItems.IndexOf(tabViewItem));
 				}
 			}
 		}