Content should be Addable to all ContentControls

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/DefaultPlacementBehavior.cs

@@ -38,27 +38,9 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 	[ExtensionFor(typeof(Viewbox))]
 	public class DefaultPlacementBehavior : BehaviorExtension, IPlacementBehavior
 	{
-		static List<Type> _contentControlsNotAllowedToAdd;
-
 		static DefaultPlacementBehavior()
-		{
+		{ }
-			_contentControlsNotAllowedToAdd = new List<Type>();
-			_contentControlsNotAllowedToAdd.Add(typeof (Frame));
-			_contentControlsNotAllowedToAdd.Add(typeof (GroupItem));
-			_contentControlsNotAllowedToAdd.Add(typeof (HeaderedContentControl));
-			_contentControlsNotAllowedToAdd.Add(typeof (Label));
-			_contentControlsNotAllowedToAdd.Add(typeof (ListBoxItem));
-			//_contentControlsNotAllowedToAdd.Add(typeof (ButtonBase));
-			_contentControlsNotAllowedToAdd.Add(typeof (StatusBarItem));
-			_contentControlsNotAllowedToAdd.Add(typeof (ToolTip));
-		}
 
-		public static bool CanContentControlAdd(ContentControl control)
-		{
-			Debug.Assert(control != null);
-			return !_contentControlsNotAllowedToAdd.Any(type => type.IsAssignableFrom(control.GetType()));
-		}
-		
 		protected override void OnInitialized()
 		{
 			base.OnInitialized();
@@ -158,12 +140,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 			if (ExtendedItem.ContentProperty.IsCollection)
 				return CollectionSupport.CanCollectionAdd(ExtendedItem.ContentProperty.ReturnType,
 				                                          operation.PlacedItems.Select(p => p.Item.Component));
-			if (ExtendedItem.View is ContentControl) {
+			
-				if (!CanContentControlAdd((ContentControl) ExtendedItem.View)) {
-					return false;
-				}
-			}
-
 			if (ExtendedItem.ContentProperty.ReturnType == typeof(string))
 				return false;
 

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Xaml/XamlEditOperations.cs

@@ -131,7 +131,7 @@ namespace ICSharpCode.WpfDesign.Designer.Xaml
 								AddInParent(parent, pastedItems);
 								pasted = true;
 							}
-						} else if (pastedItems.Count == 1 && parent.ContentProperty.Value == null && parent.ContentProperty.ValueOnInstance == null && parent.View is ContentControl && DefaultPlacementBehavior.CanContentControlAdd((ContentControl)parent.View)) {
+						} else if (pastedItems.Count == 1 && parent.ContentProperty.Value == null && parent.ContentProperty.ValueOnInstance == null && parent.View is ContentControl) {
 							AddInParent(parent, pastedItems);
 							pasted = true;
 						}