// private Custome_DAL idal = new Custome_DAL ();
        public Customer Login(String email, String password)
        {
            Custome_DAL idal          = new Custome_DAL();
            string      regexEmail    = @"^[-.@_a-zA-Z0-9áàảãạâấầẩẫậăắằẳẵặđéèẻẽẹêếềểễệíìỉĩịóòỏõọôốồổỗộơớờởỡợúùủũụưứừửữựýỳỷỹỵÁÀẢÃẠÂẤẦẨẪẬĂẮẰẲẴẶĐÉÈẺẼẸÊẾỀỂỄỆÍÌỈĨỊÓÒỎÕỌÔỐỒỔỖỘƠỚỜỞỠỢÚÙỦŨỤƯỨỪỬỮỰÝỲỶỸỴ ]+$";
            string      regexPassword = @"^[-.@_a-zA-Z0-9 ]+$";

            if (Regex.IsMatch(email, regexEmail) != true || email == "" || Regex.IsMatch(password, regexPassword) != true || password == "")
            {
                return(null);
            }
            return(idal.Login(email, password));
        }
        public bool ChangLogin(Customer cu)
        {
            Custome_DAL cus = new Custome_DAL();

            return(cus.ChangeLogin(cu));
        }