大部分完成，还有写要解决的问题

AIStudio.Wpf.DiagramDesigner.Demo/ViewModels/Links/PathGeneratorsViewModel.cs

@@ -35,6 +35,8 @@ namespace AIStudio.Wpf.DiagramDesigner.Demo.ViewModels
             ConnectionViewModel connector2 = new ConnectionViewModel(node2.RightConnector, node3.LeftConnector, DrawMode.ConnectingLineSmooth, RouterMode.RouterNormal);
             connector2.AddLabel("Smooth");
             DiagramViewModel.DirectAddItemCommand.Execute(connector2);
+
+            DiagramViewModel.ClearSelectedItemsCommand.Execute(null);
         }
     }
 }