private static void OnAveragePeaksChanged(DependencyObject o, DependencyPropertyChangedEventArgs e) { SpectrumAnalyzer spectrumAnalyzer = o as SpectrumAnalyzer; if (spectrumAnalyzer != null) { spectrumAnalyzer.OnAveragePeaksChanged((bool)e.OldValue, (bool)e.NewValue); } }