private void OnSuspending(object sender, SuspendingEventArgs args)
{
// Save app state asynchronously after requesting a deferral. Holding a deferral
// indicates that the application is busy performing suspending operations. Be
// aware that a deferral may not be held indefinitely; after about five seconds,
// the app will be forced to exit.
var deferral = args.SuspendingOperation.GetDeferral();
Task.Run(async() =>
{
deviceResources.Trim();
if (null != main)
{
main.SaveAppState();
}
await UninitializeRecognizer();
deferral.Complete();
});
}
