private void buttonAddTournament_Click(object sender, EventArgs e)
        {
            form_add_tournament form_at = new form_add_tournament();

            form_at.Owner = this;
            form_at.ShowDialog();
        }
 private void buttonAddTournament_Click(object sender, EventArgs e)
 {
     form_add_tournament form_at = new form_add_tournament();
     form_at.Owner = this;
     form_at.ShowDialog();
 }