Outline Node.

Show Children of for Example AvalonDock2 in Outline Node

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/OutlineView/OutlineNode.cs

@@ -194,6 +194,21 @@ namespace ICSharpCode.WpfDesign.Designer.OutlineView
 					var node = OutlineNode.Create(item);
 					Children.Add(node);
 				}
+				else
+				{
+					var content = item.ContentProperty;
+					if (content != null)
+					{
+						if (content.IsCollection) {
+							UpdateChildrenCore(content.CollectionElements);
+						}
+						else {
+							if (content.Value != null) {
+								UpdateChildrenCore(new[] { content.Value });
+							}
+						}
+					}
+				}
 			}
 		}