C# 写的lisp函数调用时出错，怎么回事？

zcq586567

[LispFunction("sorghum")]
        static public void sorghum()
        {
            Editor ed = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
            ed.WriteMessage("ggg");
        }
出错性息如下：
System.ArgumentException: 绑定到目标方法时出错。
   在 System.Delegate.CreateDelegate(Type type, Object firstArgument, MethodInfo
method, Boolean throwOnBindFailure)
   在 Autodesk.AutoCAD.Runtime.CommandClass.InvokeWorker(MethodInfo mi, Object
commandObject, Boolean bLispFunction)
   在
Autodesk.AutoCAD.Runtime.CommandClass.InvokeWorkerWithExceptionFilter(MethodInfo
mi, Object commandObject, Boolean bLispFunction)
   在 Autodesk.AutoCAD.Runtime.CommandClass.CommandThunk.InvokeLisp(); 错误: ADS
请求错误

ivde

需要ResultBuffer参数
static public void sorghum (ResultBuffer arg)