A quick example for handling Shopify's API request limit with ShopifySharp.

shopify-limits.cs

public async Task MyMethod(List<ShopifyOrder> orders)
{
  foreach (var order in listOfOrders)
  {
    var index = listOfOrders.IndexOf(order);

    // If this order is not the first, wait for .5 seconds (an average of 2 calls per second).
    if (index > 0)
    {
      await Task.Delay(500);
    }

    try {
      // Fulfill order here
    }
    catch (ShopifyException e) when (e.Message.ToLower().Contains("exceeded 2 calls per second for api client") || (int) e.HttpStatusCode == 429 /* Too many requests */)
    {
      // todo: wait for a longer period (e.g. 10 seconds) and try again, throwing if the retry fails too
    }
  }
}