添加项目文件。

Util.DiagramDesigner/ViewModels/BaseViewModel/GroupDesignerItemViewModel.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Util.DiagramDesigner;
+
+namespace Util.DiagramDesigner
+{
+    public class GroupDesignerItemViewModel : DesignerItemViewModelBase
+    {
+        public GroupDesignerItemViewModel() : base()
+        {
+            this.ClearConnectors();
+            this.IsHitTestVisible = false;
+        }
+
+        protected override void ExecuteEditCommand(object param)
+        {
+        }
+    }
+}