private void câpNhâtNhaCungCâpToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Nhacungcap ncc = new Nhacungcap();

            ncc.Show();
        }
 private void câpNhâtNhaCungCâpToolStripMenuItem_Click(object sender, EventArgs e)
 {
     Nhacungcap ncc = new Nhacungcap();
     ncc.Show();
 }