public async void Run(Windows.ApplicationModel.Background.IBackgroundTaskInstance taskInstance) { BackgroundTaskDeferral deferral = taskInstance.GetDeferral(); try { DeviceConnectionChangeTriggerDetails details = (DeviceConnectionChangeTriggerDetails)taskInstance.TriggerDetails; BluetoothLEDevice bleDevice = await BluetoothLEDevice.FromIdAsync(details.DeviceId); Racer device = new Racer(bleDevice); if (bleDevice.ConnectionStatus == BluetoothConnectionStatus.Connected) { if (device.AlertOnDevice && device.HasLinkLossService) { await device.SetAlertLevelCharacteristic(); } } else { if (device.AlertOnPhone) { XmlDocument xml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText01); xml.SelectSingleNode("/toast/visual/binding/text").InnerText = string.Format("Device {0} is out of range.", device.Name); ToastNotification toast = new ToastNotification(xml); ToastNotifier notifier = ToastNotificationManager.CreateToastNotifier(); notifier.Show(toast); } } } finally { deferral.Complete(); } }