webapi2.cs

    class Program
    {
        static void Main(string[] args)
        {

            System.Net.ServicePointManager.DefaultConnectionLimit = Int32.MaxValue;
            string baseAddress = "http://localhost:3333/";

            // Start OWIN host 
            using (WebApp.Start<Startup>(url: baseAddress))
            {
                Console.ReadLine();
            }

        }
    }

    public class Startup
    {
        public void Configuration(IAppBuilder appBuilder)
        {

            var config = new HttpConfiguration();

            //config.
            //add routes, configure Web API
            config.MapHttpAttributeRoutes();
            config.Routes.MapHttpRoute(
              name: "DefaultApi",
              routeTemplate: "api/{controller}/{id}",
              defaults: new { id = RouteParameter.Optional }
          );
            appBuilder.UseWebApi(config);
        }
    }


    public class TesteController : ApiController
    {
        [HttpPost]
        public HttpResponseMessage RecepcionarNotaSincrona()
        {
            var c = Request.Content.ReadAsStringAsync().Result;
            Thread.Sleep(6000);
            return new HttpResponseMessage(HttpStatusCode.OK)
            {
                Content = new StringContent(c, Encoding.UTF8, "text/plain")
            };
        }
    }