private void ButtonSendToast_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                if (!ToastHelper.IsToastBackgroundTaskRegistered)
                {
                    throw new InvalidOperationException("Toast background task must be registered first. Registration must have failed for some reason (since this happens in App.xaml.cs)");
                }

                XmlDocument toastContentDoc = ToastHelper.GenerateToastReminderContent();

                ToastNotificationManager.CreateToastNotifier().Show(new ToastNotification(toastContentDoc)
                {
                    Tag = ToastHelper.TAG_REGISTER_REMINDER // Assign a tag so there's ever only one of these notifications
                });
            }
            catch
            {
                // Report back to your telemetry
            }
        }