加载CAD自定义线型

/// <summary>
        /// 加载CAD自定义线型
        /// </summary>
        /// <param name="strLinetype"></param>
        /// <param name="strFileName"></param>
        /// <param name="Success"></param>
        /// <returns></returns>
        ///  LoadLinetype("RL", "C:/Users/Administrator/Desktop/断面方面.lin", ref success1));
        public ObjectId LoadLinetype(string strLinetype, string strFileName, ref bool Success)
        {
            ObjectId myLinetypeId = new ObjectId();
            Editor ed = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
            Database db = Autodesk.AutoCAD.DatabaseServices.HostApplicationServices.WorkingDatabase;
            Transaction trans = db.TransactionManager.StartTransaction();
            try
            {
                LinetypeTable myLinetypeTable = (LinetypeTable)trans.GetObject(db.LinetypeTableId, OpenMode.ForRead);
                if (myLinetypeTable.Has(strLinetype))
                {
                    Success = true;
                    return myLinetypeId = myLinetypeTable[strLinetype];
                }
                else
                {
                    db.LoadLineTypeFile(strLinetype, strFileName);
                    myLinetypeId = myLinetypeTable[strLinetype];
                    Success = myLinetypeTable.Has(strLinetype);
                    trans.Commit();
                }
            }
            catch
            {
                ed.WriteMessage("\nError");
            }
            finally
            {
                trans.Dispose();
            }
            return myLinetypeId;
        }