diff --git a/src/IFoxCAD.Cad/Runtime/Reflection.cs b/src/IFoxCAD.Cad/Runtime/Reflection.cs
new file mode 100644
index 0000000000000000000000000000000000000000..af8e2e73bab4aa4ca7d77fdaa5e8ecafbc8a7607
--- /dev/null
+++ b/src/IFoxCAD.Cad/Runtime/Reflection.cs
@@ -0,0 +1,63 @@
+namespace IFoxCAD.Cad;
+
+public static class Com
+{
+    #region 测试
+    //[CommandMethod("TestCom")]
+    //public static void TestCom()
+    //{
+    //    //测试1 zoom E 成功
+    //    Acap.AcadApplication.InvokeMethod("ZoomExtents");
+    //    using var tr = new DBTrans();
+    //    var r1 = tr.Editor.GetEntity("\n选择闭合多段线");
+    //    var ent = tr.GetObject<Entity>(r1.ObjectId);
+    //    if (ent is Polyline)
+    //    {
+    //        var acadent = ent.AcadObject;
+    //        //测试2 将闭合多段线改为不闭合 成功
+    //        acadent.SetProperty("closed", 0);
+    //        //测试3 偏移闭合多段线 成功
+    //        acadent.InvokeMethod("offset", 100);
+    //        //测试4，多段线增加一个点 成功
+    //        acadent.InvokeMethod("Addvertex", 0, Point2d.Origin.ToArray());
+    //        //测试5 拿到多段线图层 成功
+    //        var layer = acadent.GetProperty("Layer") as string;
+    //        MessageBox.Show(layer);
+    //    }
+    //}
+    #endregion
+    /// <summary>
+    /// com接口获取对象属性值，类似VisualLisp的vlax-get-property函数
+    /// </summary>
+    /// <param name="obj">对象</param>
+    /// <param name="key">属性名称</param>
+    /// <returns>属性值</returns>
+    public static object GetProperty(this object obj, string key)
+    {
+        var comtype = Type.GetTypeFromHandle(Type.GetTypeHandle(obj));
+        return comtype.InvokeMember(key, BindingFlags.GetProperty, null, obj, null);
+    }
+    /// <summary>
+    /// com接口设置对象属性值，类似VisualLisp的vlax-put-property函数
+    /// </summary>
+    /// <param name="obj">对象</param>
+    /// <param name="key">属性名称</param>
+    /// <param name="value">属性值</param>
+    public static void SetProperty(this object obj, string key, object value)
+    {
+        var comtype = Type.GetTypeFromHandle(Type.GetTypeHandle(obj));
+        comtype.InvokeMember(key, BindingFlags.SetProperty, null, obj, new object[] { value });
+    }
+    /// <summary>
+    /// com接口使用com方法，类似VisualLisp的vlax-invoke-method函数
+    /// </summary>
+    /// <param name="obj">对象</param>
+    /// <param name="method">方法名</param>
+    /// <param name="objArray">方法需要的参数</param>
+    /// <returns>方法的返回值</returns>
+    public static object InvokeMethod(this object obj, string method, params object[] objArray)
+    {
+        var comtype = Type.GetTypeFromHandle(Type.GetTypeHandle(obj));
+        return comtype.InvokeMember(method, BindingFlags.InvokeMethod, null, obj, objArray);
+    }
+}