private void MediaManager_StateChanged(object sender, MediaManager.Playback.StateChangedEventArgs e)
        {
            if (MediaManager.IsPlaying())
            {
                PlayPauseImage = ImageSource.FromFile("playback_controls_pause_button.png");
            }
            else
            {
                PlayPauseImage = ImageSource.FromFile("playback_controls_play_button.png");
            }

            RaisePropertyChanged(nameof(CurrentMediaItemText));

            Progress = MediaManager.Position.TotalSeconds / MediaManager.Duration.TotalSeconds;

            RaisePropertyChanged(nameof(IsVisible));
            RaisePropertyChanged(nameof(CurrentMediaItem));
        }