private void thôngTinTàiKhoảnToolStripMenuItem_Click(object sender, EventArgs e)
{
tt = new ThongTinNhanVien(s);
tt.Show();
}
private void navBarItem3_LinkClicked(object sender, DevExpress.XtraNavBar.NavBarLinkEventArgs e)
{
tt = new ThongTinNhanVien(s);
tt.Show();
}