// When the user selects a shipping rate, set that rate on the checkout and proceed to the discount activity. private void OnShippingRateSelected(ShippingRate shippingRate) { ShowLoadingDialog(Resource.String.syncing_data); SampleApplication.SetShippingRate(shippingRate, delegate { DismissLoadingDialog(); StartActivity(new Intent(this, typeof(DiscountActivity))); }, OnError); }