private void fThayDoiQuyDinh_Load(object sender, EventArgs e)
        {
            //a variable to store exception
            string ex = "";

            ThamSoBUS.GetParameters(ex);

            //if there is exception
            if (ex != "")
            {
                MessageBox.Show(ex, "Lỗi", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            //Set the text in text boxes by thamso's information
            tbSoXeSua.Text             = ThamSoDTO.SoXeSuaChuaToiDa.ToString();
            tbSoTienNo.Text            = ThamSoDTO.SoTienNoToiDa.ToString();
            checkSuDungQuyDinh.Checked = ThamSoDTO.SuDungQuyDinh4;
        }