/// <summary>
 /// Event handler of scores changed in model.
 /// </summary>
 private void Model_ScoresChanged(object sender, ScoresChangedEventArgs e)
 {
     Points = "Points:   First player: " + e.ScoreOfPlayerA + "  -  Second player: " + e.ScoreOfPlayerB;
 }
 /// <summary>
 /// Scores changed in model event handler.
 /// </summary>
 private void Model_ScoresChanged(object sender, ScoresChangedEventArgs e)
 {
     scoresLabel.Text = "Scores -- First player: " + e.ScoreOfPlayerA + "  -  Second player: " + e.ScoreOfPlayerB;
 }