private void chỉnhSửaThôngTinTàiKhoảnToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ThayDoiThongTinCaNhan x = new ThayDoiThongTinCaNhan();

            this.Hide();
            x.ShowDialog();
        }
        private void thôngTinToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ThayDoiThongTinCaNhan x = new ThayDoiThongTinCaNhan(Bs);

            x.CapNhat += x_CapNhat;
            // this.Hide();
            x.Show();
        }