public static bool InsertThiNghiem(ThiNghiem thiNghiem)
        {
            /*Call method insert city into THANHPHO_DAL layer*/
            bool result = ThiNghiem_DAL.InsertThiNghiem(thiNghiem);

            return(result);
        }
        public static bool DeleteThiNghiem(string maThiNghiem)
        {
            bool result = ThiNghiem_DAL.DeleteThiNghiem(maThiNghiem);

            return(result);
        }
 public static List <ThiNghiem> LoadThiNghiem()
 {
     return(ThiNghiem_DAL.LoadThiNghiem());
 }