protected void Page_Load(object sender, EventArgs e)
        {
            string MaGV = "";

            if (Request.QueryString["MaGV"] != null)
            {
                MaGV = Request.QueryString["MaGV"];
            }

            SinhVien.SV_DelAcc(MaGV);
            SinhVien.SV_Del(MaGV);
            Response.Redirect("AccStManagement.aspx");
        }