protected void StudentRegNoDropDownList_SelectedIndexChanged(object sender, EventArgs e)
        {
            EnrollCourse _EnrollCourse = new EnrollCourse();

            _EnrollCourse.Id = Convert.ToInt32(StudentRegNoDropDownList.SelectedValue);
            var StudentData = _EnrollCourseManager.GetStudentData(_EnrollCourse.Id);

            if (StudentData != null)
            {
                txtStudentName.Text  = StudentData.StudentName.ToString();
                txtStudentEmail.Text = StudentData.StudentEmail.ToString();
            }
            else
            {
                ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Do Not have Anydata');", true);
            }
        }