Beacons.Universal.Foreground.MainPage.MainPage C# (CSharp) Метод

        public MainPage()
        {
            this.InitializeComponent();

            // Create and initialize a new watcher instance.
            watcher = new BluetoothLEAdvertisementWatcher();

            // Monitor all iBeacons advertisment
            watcher.AdvertisementFilter.Advertisement.iBeaconSetAdvertisement(new iBeaconData());

            //// Monitor all iBeacons with UUID
            //watcher.AdvertisementFilter.Advertisement.SetiBeaconAdvertismentManufacturerData(
            //    new iBeaconData()
            //    {
            //        UUID = Guid.Parse("{307f40b9-f8f5-6e46-aff9-25556b57fe6d}")
            //    });

            //// Monitor all iBeacons with UUID and Major 
            //watcher.AdvertisementFilter.Advertisement.SetiBeaconAdvertismentManufacturerData(
            //    new iBeaconData()
            //    {
            //        UUID = Guid.Parse("{307f40b9-f8f5-6e46-aff9-25556b57fe6d}"),
            //        Major = 18012
            //    });

            //// Monitor all iBeacons with UUID and Major 
            //watcher.AdvertisementFilter.Advertisement.SetiBeaconAdvertismentManufacturerData(
            //    new iBeaconData()
            //    {
            //        UUID = Guid.Parse("{307f40b9-f8f5-6e46-aff9-25556b57fe6d}"),
            //        Major = 18012,
            //        Minor = 1040
            //    });

            beacons = new ObservableCollection<iBeaconData>();

            this.DataContext = beacons;

           
         
        }
        protected override void OnNavigatedTo(NavigationEventArgs e)