Creating AudioPlayerPageViewModel

Our AudioPlayerPageViewModel must include our ISoundHandler interface. We are going to be controlling the audio from this view-model, so our buttons can initiate the required events on the sound handler. Let's begin by making a new file inside the ViewModels folder called AudioPlayerPageViewModel.cs, and implementing the private properties to begin with:

public class AudioPlayerPageViewModel : MvxViewModel 
    { 
        #region Private Properties 
 
        private readonly ISoundHandler _soundHandler; 
 
        private string _title = "Audio Player"; 
 
        private string _descriptionMessage = "Moby - The Only Thing"; 
 
        private MvxCommand _playPauseCommand; 
 
        private MvxCommand _forwardCommand; 
 
        private MvxCommand _rewindCommand; 
 
        private float _audioPosition; 
 
        private double _currentTime; 
 
        private double _endTime; 
 
        private bool _updating; 
 
        #endregion 

Then we must add the...