diff --git a/src/CAD/IFox.CAD.Shared/ExtensionMethod/CurveEx.cs b/src/CAD/IFox.CAD.Shared/ExtensionMethod/CurveEx.cs
index 68b286ffb2d13138f2970c888364331a70413730..905d38f855f5452b0390de47a84eaa806ef2ddb5 100644
--- a/src/CAD/IFox.CAD.Shared/ExtensionMethod/CurveEx.cs
+++ b/src/CAD/IFox.CAD.Shared/ExtensionMethod/CurveEx.cs
@@ -187,7 +187,7 @@ public static List<Curve> BreakCurve(this List<Curve> curves)
             if (pars1.Count > 0)
             {
                 var c3ds = gc1.GetSplitCurves(pars1);
-                if (c3ds.Count > 1)
+                if (c3ds is not null && c3ds.Count > 1)
                 {
                     foreach (var c3d in c3ds)
                     {
diff --git a/src/CAD/IFox.CAD.Shared/IFox.CAD.Shared.projitems b/src/CAD/IFox.CAD.Shared/IFox.CAD.Shared.projitems
index ecb9c9a2bdd69f73c5f0ad0f755055eb832a40a4..b53f25cbc82fc563c0058eaaf59ceb0f8d31fa24 100644
--- a/src/CAD/IFox.CAD.Shared/IFox.CAD.Shared.projitems
+++ b/src/CAD/IFox.CAD.Shared/IFox.CAD.Shared.projitems
@@ -74,6 +74,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Runtime\Env.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Runtime\FileOpenMode.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Runtime\IAutoGo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Runtime\IdleAction.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Runtime\LateBinding.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Runtime\Log.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Runtime\MethodInfoHelper.cs" />
diff --git a/src/CAD/IFox.CAD.Shared/Runtime/IAutoGo.cs b/src/CAD/IFox.CAD.Shared/Runtime/IAutoGo.cs
index 6eed7e2bb98f29c27f0307ae6d219772cdb3bd48..3b71d4cb856acc3ef17e3caf6fce7e1d5ec41ec6 100644
--- a/src/CAD/IFox.CAD.Shared/Runtime/IAutoGo.cs
+++ b/src/CAD/IFox.CAD.Shared/Runtime/IAutoGo.cs
@@ -132,7 +132,7 @@ public void Initialize()
                 RunFunctions(_InitializeList);
             }
         }
-        catch (System.Exception e)
+        catch 
         {
             Debugger.Break();
         }
diff --git a/src/CAD/IFox.CAD.Shared/Runtime/IdleAction.cs b/src/CAD/IFox.CAD.Shared/Runtime/IdleAction.cs
new file mode 100644
index 0000000000000000000000000000000000000000..6431391ea8bfad21ec9960389db4b1cc09054383
--- /dev/null
+++ b/src/CAD/IFox.CAD.Shared/Runtime/IdleAction.cs
@@ -0,0 +1,58 @@
+namespace IFoxCAD.Cad;
+
+/// <summary>
+/// 空闲执行
+/// by DYH
+/// 20230114
+/// </summary>
+public static class IdleAction
+{
+    /// <summary>
+    /// 是否已经加载
+    /// </summary>
+    private static bool alreadyLoad = false;
+    /// <summary>
+    /// 委托列表
+    /// </summary>
+    private static readonly List<Action> actions = new();
+    /// <summary>
+    /// 未处理的委托数量
+    /// </summary>
+    public static int Count { get { return actions.Count; } }
+    /// <summary>
+    /// 添加空闲执行委托
+    /// </summary>
+    /// <param name="action">委托</param>
+    public static void Add(Action action)
+    {
+        actions.Add(action);
+        if (!alreadyLoad)
+        {
+            Acap.Idle -= Acap_Idle;
+            Acap.Idle += Acap_Idle;
+            alreadyLoad = true;
+        }
+    }
+    /// <summary>
+    /// 空闲处理事件
+    /// </summary>
+    /// <param name="sender">Acap</param>
+    /// <param name="e">事件参数</param>
+    private static void Acap_Idle(object sender, EventArgs e)
+    {
+        if (Count == 0)
+        {
+            alreadyLoad = false;
+            Acap.Idle -= Acap_Idle;
+            return;
+        }
+        try
+        {
+            actions[0]?.Invoke();
+        }
+        finally
+        {
+            actions.RemoveAt(0);
+        }
+    }
+}