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

            lcStudent.Country = TxtCountry.Text;
            lcStudent.ELTS    = TxtELTS.Text;
        }
        protected override void UpdateDisplay()
        {
            base.UpdateDisplay();
            ClsInternationalStudent lcStudent = (ClsInternationalStudent)_Student;

            TxtCountry.Text = lcStudent.Country;
            TxtELTS.Text    = lcStudent.ELTS;
        }