private void BtnPlace_Click(object sender, RoutedEventArgs e)
        {
            PlaceWindow pw = new PlaceWindow(PlaceWndName.SelectPlace);

            if (pw.ShowDialog() == true)
            {
                Buffer.NumPlace = pw.InfoSource.NumPlace;
            }
        }
        private void FreePlace_Click(object sender, RoutedEventArgs e)
        {
            PlaceWindow pw = new PlaceWindow(PlaceWndName.FreePlace);

            pw.Show();
        }