public override void OnCreate()
        {
            base.OnCreate();

            _screenOffReceiver = new ScreenOffReceiver();
            IntentFilter filter = new IntentFilter();
            filter.AddAction(Intent.ActionScreenOff);
            RegisterReceiver(_screenOffReceiver, filter);
        }
        public override void OnCreate()
        {
            base.OnCreate();

            _screenOffReceiver = new ScreenOffReceiver();
            IntentFilter filter = new IntentFilter();

            filter.AddAction(Intent.ActionScreenOff);
            RegisterReceiver(_screenOffReceiver, filter);
        }