public int getMaBaiVietLichLamViec()
        {
            int ma = -1;

            using (LinQDataContext db = new LinQDataContext(global::DAOAuction.Properties.Settings.Default.webdoantruongConnectionString))
            {

                ISingleResult<TAPTINBAIVIET_getmabaivietlichlamviecResult> lp = db.TAPTINBAIVIET_getmabaivietlichlamviec();
                foreach (TAPTINBAIVIET_getmabaivietlichlamviecResult lichlamviec in lp)
                {
                    ma = lichlamviec.MaBaiViet;
                }
                try
                {
                    // Save the changes.
                    db.SubmitChanges();
                }
                // Detect concurrency conflicts.
                catch (ChangeConflictException)
                {
                    // Resolve conflicts.
                    db.ChangeConflicts.ResolveAll(RefreshMode.KeepChanges);
                }
            }

            return ma;
        }