Effectively use async/await with ASP.NET Web API

Question

I am trying to make use of the async/await feature of ASP.NET in my Web API project. I am not very sure whether it will make any difference in performance of my

Answer 1

I would change your service layer to:

public Task>> ReturnAllCountries()
{
    return Task.Run(() =>
    {
        return _service.Process>(BackOfficeEndpoint.CountryEndpoint, "returnCountries");
    }      
}

as you have it, you are still running your _service.Process call synchronously, and gaining very little or no benefit from awaiting it.

With this approach, you are wrapping the potentially slow call in a Task, starting it, and returning it to be awaited. Now you get the benefit of awaiting the Task.