I am using Naudio lib to write a simple win form audio recorder/player. My problem is how can I tell the playback is completed? I need to close the wave stream after that.

I knew there is a PlaybackStopped event listed below:

       wfr = new NAudio.Wave.WaveFileReader(this.outputFilename);
        audioOutput = new DirectSoundOut();
        WaveChannel32 wc = new NAudio.Wave.WaveChannel32(wfr); 
        audioOutput.Init(wc);
        audioOutput.PlaybackStopped += new EventHandler<StoppedEventArgs>(audioOutput_PlaybackStopped);
        audioOutput.Play();

But this PlaybackStopped event seems can only be triggered by calling audioOutput.stop(), do anyone know how to determine if playback is complected?

Thanks in advance

C#,windows form,Naudio,windows 7,64bits