Universal Windows® Apps with XAML and C# Unleashed

Handling the Suspending Event

Visual Studio-generated projects handle Application’s Suspending event in a handler called OnSuspending in App.xaml.cs. In a Blank App project, however, it’s waiting for you to do something useful:

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private void OnSuspending(object sender, SuspendingEventArgs e) {   var deferral = e.SuspendingOperation.GetDeferral();   //TODO: Save application state and stop any background activity   deferral.Complete(); }

The SuspendingEventArgs instance has a single SuspendingOperation property that exposes the GetDeferral method used in this snippet and a Deadline property that tells you how long you have to finish your logic in response to this event (currently five seconds).

As for the actual work, ...