private void RefreshChordQualities(IChordQuality selectedChordQuality = null) { ChordQualities = AppVM.GetChordQualities(); SelectedChordQuality = null; if (null != selectedChordQuality && null != ChordQualities) { foreach (ObservableChordQuality ocq in ChordQualities) { if (ocq.ChordQuality == selectedChordQuality) { SelectedChordQuality = ocq; break; } } } }