private void UnregisterNotifications()
{
if (sessions != null)
{
sessions = null;
}
if (audioSessionNotification != null)
{
Marshal.ThrowExceptionForHR(audioSessionInterface2.UnregisterSessionNotification(audioSessionNotification));
}
}
/// <summary>
/// Refresh session of current device.
/// </summary>
public void RefreshSessions()
{
UnregisterNotifications();
if (audioSessionInterface2 != null)
{
IAudioSessionEnumerator sessionEnum;
Marshal.ThrowExceptionForHR(audioSessionInterface2.GetSessionEnumerator(out sessionEnum));
sessions = new SessionCollection(sessionEnum);
audioSessionNotification = new AudioSessionNotification(this);
Marshal.ThrowExceptionForHR(audioSessionInterface2.RegisterSessionNotification(audioSessionNotification));
}
}