diff --git a/src/CAD/IFox.CAD.Shared/ExtensionMethod/DBObjectEx.cs b/src/CAD/IFox.CAD.Shared/ExtensionMethod/DBObjectEx.cs
index 9733d949f1495bf0f4b704da285824f30f50e305..711c2707774e2f5fec1adcd0427eacb33407577a 100644
--- a/src/CAD/IFox.CAD.Shared/ExtensionMethod/DBObjectEx.cs
+++ b/src/CAD/IFox.CAD.Shared/ExtensionMethod/DBObjectEx.cs
@@ -50,7 +50,17 @@ public static void RemoveXData(this DBObject obj, string appName)
                 obj.XData = rb;
         }
     }
-
+    /// <summary>
+    /// 克隆对象
+    /// </summary>
+    /// <typeparam name="T">对象类型</typeparam>
+    /// <param name="ent">对象</param>
+    /// <returns>克隆后的对象</returns>
+    /// <exception cref="ArgumentException"></exception>
+    public static T CloneEx<T>(this T ent) where T : RXObject
+    {
+        return ent.Clone() is T tEnt ? tEnt : throw new ArgumentException(nameof(CloneEx) + "克隆出错");
+    }
     /// <summary>
     /// 修改扩展数据
     /// </summary>
diff --git a/src/CAD/IFox.CAD.Shared/IFox.CAD.Shared.projitems b/src/CAD/IFox.CAD.Shared/IFox.CAD.Shared.projitems
index f76f248e2917164c73d343faccd4b700871960aa..87d452010306b17ae7c9dd7bd466069407860be1 100644
--- a/src/CAD/IFox.CAD.Shared/IFox.CAD.Shared.projitems
+++ b/src/CAD/IFox.CAD.Shared/IFox.CAD.Shared.projitems
@@ -51,6 +51,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\LogEx\LogBase.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\LogEx\LogTarget.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\LogEx\LogTxt.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\LogEx\LogHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\ObjectIdEx.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\ObjEx.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\PointEx.cs" />
@@ -81,7 +82,6 @@
     <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\CadInternalUtils.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)AutoReg\IAutoGo.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\IdleAction.cs" />
-    <Compile Include="..\IFox.CAD.Shared\ExtensionMethod\LogEx\LogHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)AutoReg\MethodInfoHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)PE\AcadPeInfo.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)PE\DBmod.cs" />
@@ -89,7 +89,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)PE\ProgramPE.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ExtensionMethod\RedrawEx.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Runtime\SymbolTable.cs" />
-    <Compile Include="..\IFox.CAD.Shared\Runtime\DBTransHelper.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Runtime\DBTransHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)SelectionFilter\OpComp.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)SelectionFilter\OpEqual.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)SelectionFilter\OpFilter.cs" />