private void StartTrackTimer(TrackModel selectedMusic)
        {
            if (selectedMusic.DurationSec == null)
            {
                Duration         = StringFormatter.DurationFormat(selectedMusic.DurationMillisec);
                MaxProgressValue = Convert.ToDouble(selectedMusic.DurationMillisec);

                Device.StartTimer(TimeSpan.FromSeconds(0.2), () =>
                {
                    ProgressValue = (double)audioService.CurrentTrackProgressPosition();
                    Position      = StringFormatter.DurationFormat(audioService.CurrentTrackProgressPosition().ToString());

                    return(true);
                });
            }
            else
            {
                MaxProgressValue = Convert.ToDouble(selectedMusic.DurationSec);
                Duration         = StringFormatter.DurationFormat((MaxProgressValue * 1000).ToString());

                Device.StartTimer(TimeSpan.FromSeconds(0.2), () =>
                {
                    ProgressValue = (double)audioService.CurrentTrackProgressPosition();
                    Position      = StringFormatter.DurationFormat((audioService.CurrentTrackProgressPosition() * 1000).ToString());

                    return(true);
                });
            }
        }