private void buttonUpdate2_Click(object sender, EventArgs e)
        {
            c.id             = int.Parse(textSearch.Text);
            c.yearSemester   = comboYearSemester2.Text;
            c.programme      = comboProgrammer2.Text;
            c.groupNumber    = Convert.ToInt32(numericUpGNumber2.Value);
            c.subgroupNumber = Convert.ToInt32(numericSGNumber2.Value);
            c.groupID        = textGID2.Text;
            c.subGroupID     = textSGID2.Text;

            bool success = c.Update(c);

            if (success == true)
            {
                MessageBox.Show("Updated.........");
            }
            else
            {
                MessageBox.Show("Failed to update. Try Again...");
            }

            DataTable dt = c.Select();

            dataGridViewGroups.DataSource = dt;
        }