protected override void pushData()
        {
            base.pushData();
            ClsInternationalStudent lcStudent = (ClsInternationalStudent)_Student;

            lcStudent.Country = txtCountry.Text;
            lcStudent.IELTS   = Convert.ToInt16(txtIELTS.Text);
        }
        protected override void updateDisplay()
        {
            base.updateDisplay();
            ClsInternationalStudent lcStudent = (ClsInternationalStudent)_Student;

            txtCountry.Text = lcStudent.Country;
            txtIELTS.Text   = Convert.ToString(lcStudent.IELTS);
        }