private void CheckForVictory() { IsNotWin = !Buttons.All(x => x.Value == null || x.Value == x.Position + 1); if (!IsNotWin) { Title = "Victory! Press restart!"; } PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Title))); PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsNotWin))); }