private void previousCourseToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            frmPreviousCourse frm = new frmPreviousCourse(StudentID);

            frm.Show();
            this.Hide();
        }
        private void btnPreviousCourse_Click(object sender, EventArgs e)
        {
            frmPreviousCourse frm = new frmPreviousCourse(StudentId);

            frm.Show();
            this.Hide();
        }