// Fetching shipping rates requires communicating with 3rd party shipping servers, so we need to poll until all the rates have been fetched.
private async Task FetchShippingRatesAsync()
{
try
{
IEnumerable <ShippingRate> shippingRates;
while ((shippingRates = await SampleApplication.GetShippingRatesAsync()) == null)
{
await Task.Delay(PollDelay);
}
OnFetchedShippingRates(shippingRates.ToList());
}
catch (ShopifyException ex)
{
OnError(ex.Error);
}
isFetching = false;
}
