private void detach_tbl_HangHoas(tbl_HangHoa entity)
 {
     this.SendPropertyChanging();
     entity.tbl_LoaiHangHoa = null;
 }
 partial void Updatetbl_HangHoa(tbl_HangHoa instance);
 partial void Deletetbl_HangHoa(tbl_HangHoa instance);
 partial void Inserttbl_HangHoa(tbl_HangHoa instance);