fix CA1864

Author: Edward Miller

src/Controls/src/Core/Handlers/Items/Android/Adapters/ItemsViewAdapter.cs

@@ -113,9 +113,7 @@ public override int GetItemViewType(int position)
 				var id = template?.Id ?? ItemViewType.TemplatedItem;
 
 				// Cache the data template for future use
-				if (!_viewTypeDataTemplates.ContainsKey(id))
-					_viewTypeDataTemplates.Add(id, template);
-
+				_viewTypeDataTemplates.TryAdd(id, template);
 				return id;
 			}
 

src/Core/src/.editorconfig

@@ -16,5 +16,6 @@ dotnet_diagnostic.CA1846.severity = error
 dotnet_diagnostic.CA1847.severity = error
 dotnet_diagnostic.CA1859.severity = error
 dotnet_diagnostic.CA1860.severity = error
+dotnet_diagnostic.CA1864.severity = error
 dotnet_diagnostic.CA1865.severity = error
 dotnet_diagnostic.CA2249.severity = error

src/Core/src/VisualDiagnostics/VisualDiagnosticsOverlay.Windows.cs

@@ -20,9 +20,8 @@ public void AddScrollableElementHandler(IScrollView scrollBar)
 
 			if (nativeScroll != null && nativeScroll is ScrollViewer viewer)
 			{
-				if (!_scrollViews.ContainsKey(scrollBar))
+				if (_scrollViews.TryAdd(scrollBar, viewer))
 				{
-					_scrollViews.Add(scrollBar, viewer);
 					viewer.ViewChanging += OnViewChanging;
 				}
 			}