//Bring back the camera for another qr scanning
private async void buttonVerifySession_Click(object sender, RoutedEventArgs e)
{
capturePreview.Visibility = Visibility.Visible;
await camera.InitPreview(capturePreview);
await camera.AutoFocus();
timer.Start();
textBlockSessionInfoExtra.Text = "";
}
private async void Page_Loaded(object sender, RoutedEventArgs e)
{
camera = UniversalCamera.GetDefault();
await camera.InitPreview(capturePreview);
timer = new DispatcherTimer();
timer.Interval = new TimeSpan(0, 0, 1);
timer.Tick += Timer_Tick;
await camera.AutoFocus();
timer.Start();
}