要启用属性的路由，在配置过程中调用MapMvcAttributeRoutes。以下是code剪断。

To enable attribute routing, call MapMvcAttributeRoutes during configuration. Following are the code snipped.

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

在MVC5，我们可以结合属性与基于约定的路由的路由。以下是code剪断。

In MVC5, we can combine attribute routing with convention-based routing. Following are the code snipped.

        public static void RegisterRoutes(RouteCollection routes)
         {
          routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
          routes.MapMvcAttributeRoutes();
          routes.MapRoute(
          name: "Default",
          url: "{controller}/{action}/{id}",
          defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
       );
  }

这是很容易使一个URI参数可选通过添加一个问号路线参数。我们也可以通过使用形式为parameter = value指定一个默认值。 这里是完整的文章。