diff --git a/DeedyDesigner/Deedy.Activity/Contract/Interface/IContainerElement.cs b/DeedyDesigner/Deedy.Activity/Contract/Interface/IContainerElement.cs
index 218d431..f469cc4 100644
--- a/DeedyDesigner/Deedy.Activity/Contract/Interface/IContainerElement.cs
+++ b/DeedyDesigner/Deedy.Activity/Contract/Interface/IContainerElement.cs
@@ -11,78 +11,13 @@ namespace Deedy.Activity
     {
         public void Append(IElement element) => this.Elements.Add(element);
         public void Remove(IElement element) => this.Elements.Remove(element);
-        public void Insert(IElement element, uint index)
-        {
-            if (element == null) return;
-            if (index < this.Elements.Count) this.Elements.Insert((int)index, element);
-            if (index >= this.Elements.Count) this.Elements.Add(element);
-        }
-        public void MoveTo(IElement element, uint index)
-        {
-            if (element == null) return;
-            int newIndex = (index >= this.Elements.Count) ? this.Elements.Count - 1 : (int)index;
-            int oldIndex = this.Elements.IndexOf(element);
-            if (oldIndex < 0) this.Elements.Insert(newIndex, element);
-            else this.Elements.Move(oldIndex, newIndex);
-        }
+        public void Insert(IElement element, uint index) => this.Help_Insert(element, index);
+        public void MoveTo(IElement element, uint index) => this.Help_MoveTo(element, index);
         /// <summary>
         /// 如果类型上没有组装规则，则认为不允许组装，否则按照组装规则处理
         /// </summary>
         /// <param name="element">要进行组装检查的单元实例</param>
         /// <returns>是否允许组装</returns>
-        public bool CombineChecking(IElement element, out DragDropEffects effects)
-        {
-            DragDropEffects resultEffects = DragDropEffects.None;
-            List<CombineRule_AllowTypeAttribute> _AllowTypes = [];
-            List<CombineRule_RejectTypeAttribute> _RejectTypes = [];
-            this.GetCombineRules(ref _AllowTypes, ref _RejectTypes);
-            if (element == null)
-            {
-                effects = resultEffects;
-                return false;
-            }
-            // 如果没有组装规则则直接返回
-            if (_AllowTypes.Count == 0 && _RejectTypes.Count == 0)
-            {
-                effects = resultEffects;
-                return false;
-            }
-
-            Type uType = element.GetType();
-            bool allow = false;
-            foreach (var aRule in _AllowTypes)
-            {
-                if (aRule.BaseType.IsAssignableFrom(uType))
-                {
-                    if (!aRule.Excluded.Contains(uType))
-                    {
-                        allow = true;
-                        break;
-                    }
-                }
-            }
-            if (!allow)
-            {
-                effects = resultEffects;
-                return allow;               // 如果没有匹配的放行规则则直接返回
-            }
-
-            resultEffects |= DragDropEffects.Copy | DragDropEffects.Move | DragDropEffects.Link;
-
-            foreach (var rRule in _RejectTypes)
-            {
-                if (rRule.BaseType.IsAssignableFrom(uType))
-                {
-                    if (!rRule.Excluded.Contains(uType))
-                    {
-                        resultEffects &= DragDropEffects.None;
-                        allow = false;
-                        break;
-                    }
-                }
-            }
-            effects = resultEffects;
-            return allow;
-        }
+        public bool CombineChecking(IElement element, out DragDropEffects effects) => this.Help_CombineChecking(element, out effects);
     }
 }
diff --git a/DeedyDesigner/Deedy.Activity/Helpers/ActionHelper.cs b/DeedyDesigner/Deedy.Activity/Helpers/ActionHelper.cs
new file mode 100644
index 0000000..e5919c4
--- /dev/null
+++ b/DeedyDesigner/Deedy.Activity/Helpers/ActionHelper.cs
@@ -0,0 +1,87 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace Deedy.Activity
+{
+    public static partial class Helper
+    {
+        /// <summary>
+        /// 如果类型上没有组装规则，则认为不允许组装，否则按照组装规则处理
+        /// </summary>
+        /// <param name="element">要进行组装检查的单元实例</param>
+        /// <returns>是否允许组装</returns>
+        public static bool Help_CombineChecking(this IContainerElement container, IElement element, out DragDropEffects effects)
+        {
+            DragDropEffects resultEffects = DragDropEffects.None;
+            List<CombineRule_AllowTypeAttribute> _AllowTypes = [];
+            List<CombineRule_RejectTypeAttribute> _RejectTypes = [];
+            GetCombineRules(container, ref _AllowTypes, ref _RejectTypes);
+
+            if (element == null)
+            {
+                effects = resultEffects;
+                return false;
+            }
+            // 如果没有组装规则则直接返回
+            if (_AllowTypes.Count == 0 && _RejectTypes.Count == 0)
+            {
+                effects = resultEffects;
+                return false;
+            }
+
+            Type uType = element.GetType();
+            bool allow = false;
+            foreach (var aRule in _AllowTypes)
+            {
+                if (aRule.BaseType.IsAssignableFrom(uType))
+                {
+                    if (!aRule.Excluded.Contains(uType))
+                    {
+                        allow = true;
+                        break;
+                    }
+                }
+            }
+            if (!allow)
+            {
+                effects = resultEffects;
+                return allow;               // 如果没有匹配的放行规则则直接返回
+            }
+
+            resultEffects |= DragDropEffects.Copy | DragDropEffects.Move | DragDropEffects.Link;
+
+            foreach (var rRule in _RejectTypes)
+            {
+                if (rRule.BaseType.IsAssignableFrom(uType))
+                {
+                    if (!rRule.Excluded.Contains(uType))
+                    {
+                        resultEffects &= DragDropEffects.None;
+                        allow = false;
+                        break;
+                    }
+                }
+            }
+            effects = resultEffects;
+            return allow;
+        }
+        public static void Help_Insert(this IContainerElement @this, IElement element, uint index)
+        {
+            if (element == null) return;
+            if (index < @this.Elements.Count) @this.Elements.Insert((int)index, element);
+            if (index >= @this.Elements.Count) @this.Elements.Add(element);
+        }
+        public static void Help_MoveTo(this IContainerElement @this, IElement element, uint index)
+        {
+            if (element == null) return;
+            int newIndex = (index >= @this.Elements.Count) ? @this.Elements.Count - 1 : (int)index;
+            int oldIndex = @this.Elements.IndexOf(element);
+            if (oldIndex < 0) @this.Elements.Insert(newIndex, element);
+            else @this.Elements.Move(oldIndex, newIndex);
+        }
+    }
+}