public int Them(DANGKYHOATDONG lpDTO)
        {
            try
            {
                LinQDataContext db = new LinQDataContext(global::DAOAuction.Properties.Settings.Default.webdoantruongConnectionString);
                return db.DANGKYHOATDONG_add(
                    lpDTO.MaNguoiDung ,
                    lpDTO.MaHoatDong
                    );

            }
            catch (Exception ex)
            {
                throw (ex);
            }
        }