/// <summary>
/// Invoked when application execution is being suspended. Application state is saved
/// without knowing whether the application will be terminated or resumed with the contents
/// of memory still intact.
/// </summary>
/// <param name="sender">The source of the suspend request.</param>
/// <param name="e">Details about the suspend request.</param>
private void OnSuspending(object sender, SuspendingEventArgs e)
{
var deferral = e.SuspendingOperation.GetDeferral();
// Perform suspending logic on non UI thread to avoid deadlocks
// since some ongoing flows may need access to UI thread
new System.Threading.Tasks.Task(async() =>
{
await mainViewModel.OnAppSuspending();
deferral.Complete();
}).Start();
}
