private void OnEdit()
        {
            if ( SelectedLeague == null )
            {
                ShowDialog( "League not selected" );
                return;
            }

            var id = SelectedLeague.ID;
            var dialog = new EditLeagueView( id );
            dialog.Show();
        }
 private void NewLeagueButtonClick( object sender, RoutedEventArgs e )
 {
     var dialog = new EditLeagueView( 0 );
     dialog.Show();
 }