public class RecordPlayer : INotifyPropertyChanged

Public Class RecordPlayer
	Implements INotifyPropertyChanged

public ref class RecordPlayer : INotifyPropertyChanged

public static void TestRecordPlayer()
{
    RecordPlayer rp = new RecordPlayer();
    rp.PropertyChanged += new PropertyChangedEventHandler(rp_PropertyChanged);
    rp.Open(new Mp3Reader(File.OpenRead("in.mp3")));
    rp.Play();
}

static void rp_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
    switch (e.PropertyName)
    {
        case RecordPlayer.StateProperty:
            RecordPlayer rp = ((RecordPlayer)sender);
            if (rp.State == DeviceState.Stopped)
            {
                rp.Close();
            }
            break;
    }
}