diff --git a/Extensions/AIStudio.Wpf.Mind/ViewModels/MindDiagramViewModel.cs b/Extensions/AIStudio.Wpf.Mind/ViewModels/MindDiagramViewModel.cs
index 599b4be..9b9c9c4 100644
--- a/Extensions/AIStudio.Wpf.Mind/ViewModels/MindDiagramViewModel.cs
+++ b/Extensions/AIStudio.Wpf.Mind/ViewModels/MindDiagramViewModel.cs
@@ -785,7 +785,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
             items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
         }
 
-        protected override List<SelectableDesignerItemViewModelBase> Delete(object parameter, bool delete = true, bool direct = true)
+        protected override void ExecuteDeleteCommand(object parameter)
         {
             List<MindNode> items = new List<MindNode>();
             List<SelectableDesignerItemViewModelBase> others = new List<SelectableDesignerItemViewModelBase>();
@@ -815,47 +815,43 @@ namespace AIStudio.Wpf.Mind.ViewModels
                 //去重
                 items = items.Distinct().ToList();
 
-                if (delete)
-                {
-                    Dictionary<MindNode, Tuple<int, MindNode>> indexs = items.ToDictionary(p => p, p => new Tuple<int, MindNode>(p.ParentNode != null ? p.ParentNode.Children.IndexOf(p) : 0, p.ParentNode));
-                    DoCommandManager.DoNewCommand(this.ToString(),
-                      () => {
 
-                          foreach (var item in items.ToList())
+                Dictionary<MindNode, Tuple<int, MindNode>> indexs = items.ToDictionary(p => p, p => new Tuple<int, MindNode>(p.ParentNode != null ? p.ParentNode.Children.IndexOf(p) : 0, p.ParentNode));
+                DoCommandManager.DoNewCommand(this.ToString(),
+                  () => {
+
+                      foreach (var item in items.ToList())
+                      {
+                          item.RemoveFrom();
+                      }
+
+                      if (others.Any())
+                      {
+                          base.Delete(others);
+                      }
+
+                      items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
+                  },
+                  () => {
+                      if (others.Any())
+                      {
+                          base.Add(others);
+                      }
+
+                      foreach (var item in items)
+                      {
+                          item.AddTo(indexs[item].Item2, indexs[item].Item1, false);
+                          if (item.ParentId == Guid.Empty)
                           {
-                              item.RemoveFrom();
+                              item.Offset = new PointBase();
                           }
+                      }
 
-                          if (others.Any())
-                          {
-                              base.Delete(others);
-                          }
-
-                          items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
-                      },
-                      () => {
-                          if (others.Any())
-                          {
-                              base.Add(others);
-                          }
-
-                          foreach (var item in items)
-                          {
-                              item.AddTo(indexs[item].Item2, indexs[item].Item1, false);
-                              if (item.ParentId == Guid.Empty)
-                              {
-                                  item.Offset = new PointBase();
-                              }
-                          }
-
-                          items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
-                      });
-                }
-                return items.OfType<SelectableDesignerItemViewModelBase>().ToList();
+                      items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
+                  });
             }
-            else
-                return null;
         }
+
         #endregion
 
         #region 复制,粘贴