Supports building a REST API with ASP.net MVC 5

RouteConfig.cs

public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            
            // add this block \o/
            routes.MapRoute(
                name: "single", 
                url: "{controller}/{id}",
                defaults: new { controller = "Home", action = "Index" },
                constraints: new { id = @"^[0-9]+$" }
            );

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