public override bool StartNotifyBeep ()
{
if (!AUDIOSESSION_INITIALIZED) {
AudioSession.Initialize ();
AudioSession.Category = AudioSessionCategory.MediaPlayback;
AUDIOSESSION_INITIALIZED = true;
}
if (!AUDIOSESSION_ACTIVE) {
AudioSession.SetActive (true);
AUDIOSESSION_ACTIVE = true;
}
var sound = SystemSound.FromFile ("res/SystemAlert.wav");
sound.PlayAlertSound ();
return true;
}