void slider_muteStateChangedSink(VolumeSliderControl _volumeSliderControl, bool _newValue)
 {
     if (muteStateChanged != null)
     {
         muteStateChanged(this, _newValue);
     }
 }
 void slider_valueChangedSink(VolumeSliderControl _volumeSliderControl, uint _newValue)
 {
     RotaryButton.Value = Slider.Value;
     this.volumeValueChanged();
 }