Background Task In Windows Universal Apps

Here I'm sharing some notes on the Background task.

Background task allows us to run our code, when our app is not in the foreground.
Starting with Windows 10, you no longer need to place an app on the lock screen in order to register the background tasks.
Background tasks are limited to 30 seconds of wall-clock usage.
Respect Cost: Add BackgroundWorkCostValue in run() to get an access on priority from the system.
Querying cost can prevent the cancellations and incomplete operations.
Handle System Cancellations:
Use deferral for any Asynchronous operations.
App can have more than one background task.
If it gets the permission, build and register task (add triggers, add system conditions, task.register()).
Some of the Triggers : DeviceWatcherTrigger , ActivitySensorTrigger , SensorDataThresholdTrigger , ToastNotificationHistoryChangedTrigger , ToastNotificationActionTrigger ,AppointmentStoreNotificationTrigger , ContactStoreNotificationTrigger , EmailStoreNotificationTrigger , BluetoothLEAdvertisementWatcherTrigger , BluetoothLEAdvertisementPublisherTrigger , MediaProcessingTrigger ,SocketActivityTrigger
User Invoked Constraints: Quite Hours(No toast, No Background task,Active task are cancelled). Still allowed are VOIP toast and Alarm toast.
Debugging : Visual Studio can trigger. Application logs = Appication & Services Logs ->Microsoft -> BackgroundTaskInfrastructure.