private void btnThem_Click(object sender, EventArgs e)
        {
            frmThemLSCongTac them = new frmThemLSCongTac();

            them.Show();
        }
 private void btnThem_Click(object sender, EventArgs e)
 {
     frmThemLSCongTac them = new frmThemLSCongTac();
     them.Show();
 }