public static void Register(HttpConfiguration config)
    {
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{action}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

        config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));

        GlobalConfiguration.Configuration.Formatters.JsonFormatter.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
    }

public object GetProduct(int id)
    {
        var productRepo = new ProductRepository(db);
        var product = productRepo.GetItem(id);
        return product.ToAnonymousType();
    }

    public object GetTest()
    {
        var productRepo = new ProductRepository(this.db);
        var product = productRepo.GetItem(10000);
        return product.ToAnonymousType();
    }

public object GetTest(int id)

public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );
    }

protected void Application_Start()
    {
        BundleConfig.RegisterBundles(BundleTable.Bundles);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        GlobalConfiguration.Configure(WebApiConfig.Register);
    }

RouteConfig.RegisterRoutes(RouteTable.Routes);

GlobalConfiguration.Configure(WebApiConfig.Register);

url: "{controller}/{action}/{id}"

api/product/gettest

GlobalConfiguration.Configure(WebApiConfig.Register);

RouteConfig.RegisterRoutes(RouteTable.Routes);