实现了多画布下，节点的复制粘贴功能

Workbench/Tool/WpfFuncTool.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Controls;
+using System.Windows.Media;
+using System.Windows;
+
+namespace Serein.Workbench.Tool
+{
+    internal static class WpfFuncTool
+    { /// <summary>
+      /// 创建菜单子项
+      /// </summary>
+      /// <param name="header"></param>
+      /// <param name="handler"></param>
+      /// <returns></returns>
+        public static MenuItem CreateMenuItem(string header, RoutedEventHandler handler)
+        {
+            var menuItem = new MenuItem { Header = header };
+            menuItem.Click += handler;
+            return menuItem;
+        }
+
+
+
+        /// <summary>
+        /// 穿透元素获取区域容器
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="element"></param>
+        /// <returns></returns>
+        public static T? GetParentOfType<T>(DependencyObject element) where T : DependencyObject
+        {
+            while (element != null)
+            {
+                if (element is T e)
+                {
+                    return e;
+                }
+                element = VisualTreeHelper.GetParent(element);
+            }
+            return null;
+        }
+
+    }
+}