public static class BEdit
    {
        [CommandMethod("TestBEDIT")]
        public static void TestBEdit()
        { 
            Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
            if (Autodesk.AutoCAD.Internal.AcAeUtilities.IsInBlockEditor())
            {
                ed.WriteMessage("\n块编辑器的块名是" + Autodesk.AutoCAD.Internal.AcAeUtilities.GetBlockName());
            }
            else
            {
                ed.WriteMessage("\n没有名字");
            }
        }
    }