public void ClearGame() { spiel = null; spiel = new Spiel(this); EventBox.Text = ""; foreach (Canvas canvas in SchussFeld.spielbaresSpielfeld.Children) { canvas.MouseDown += Canvas_MouseDown; canvas.Children.Clear(); } foreach (Canvas canvas in TestPLayerSpielfeld.spielbaresSpielfeld.Children) { canvas.Background = Brushes.Blue; canvas.MouseDown += Canvas_MouseDown; } foreach (Canvas canvas in SchiffFeld.spielbaresSpielfeld.Children) { canvas.Children.Clear(); canvas.Background = Brushes.Blue; } FinishPlacement.IsEnabled = false; Brush brush = Brushes.Gray; ACControl.SetColor(brush); BSControl.SetColor(brush); CControl.SetColor(brush); DControl.SetColor(brush); SControl.SetColor(brush); }