private void button_to_bomon_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
 {
     quanlytobomon _ql_tobomon = new quanlytobomon();
     _ql_tobomon.Show();
 }
        private void button_to_bomon_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            quanlytobomon _ql_tobomon = new quanlytobomon();

            _ql_tobomon.Show();
        }