private void Update_Click(object sender, EventArgs e)
        {
            Add_Student frm = new Add_Student();

            frm.txtID.Text              = this.metroGrid1.CurrentRow.Cells[0].Value.ToString();
            frm.txtFirst_Name.Text      = this.metroGrid1.CurrentRow.Cells[1].Value.ToString();
            frm.txtLast_Name.Text       = this.metroGrid1.CurrentRow.Cells[2].Value.ToString();
            frm.txtBirthDate.Text       = this.metroGrid1.CurrentRow.Cells[3].Value.ToString();
            frm.cmboxClass.Text         = this.metroGrid1.CurrentRow.Cells[4].Value.ToString();
            frm.cmboxAcademic_Year.Text = this.metroGrid1.CurrentRow.Cells[5].Value.ToString();
            frm.TxtPhone_Number.Text    = this.metroGrid1.CurrentRow.Cells[6].Value.ToString();
            frm.cmboxSupervisor.Text    = this.metroGrid1.CurrentRow.Cells[7].Value.ToString();
            frm.TxtAddress.Text         = this.metroGrid1.CurrentRow.Cells[8].Value.ToString();
            frm.cmboxFees.Text          = this.metroGrid1.CurrentRow.Cells[9].Value.ToString();

            frm.Text = "Update Student Number: " + this.metroGrid1.CurrentRow.Cells[0].Value.ToString();

            frm.Ok.Text                = "Update";
            frm.state                  = "Update";
            frm.txtID.ReadOnly         = true;
            frm.txtFirst_Name.TabIndex = 0;
            frm.txtID.TabIndex         = 100;
            frm.ShowDialog();
        }
        private void AddStudent_Click(object sender, EventArgs e)
        {
            Add_Student frm = new Add_Student();

            frm.ShowDialog();
        }
        private void addStudentToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            Add_Student frm = new Add_Student();

            frm.ShowDialog();
        }