private void thôngTinToolStripMenuItem_Click(object sender, EventArgs e)
{
ThongTinCaNhan f = new ThongTinCaNhan();
f.ShowDialog();
}
private void đổiMậtKhẩuToolStripMenuItem_Click(object sender, EventArgs e)
{
ThongTinCaNhan t = new ThongTinCaNhan();
t.ShowDialog();
}