title: Route to different actions with the same url with different params
body: <p>I'm building api with such routes:
  <code>/items</code> and <code>/items/{id}</code>.
  For now I want to route this routes to two different actions. I am not able to configure it with attributes, here is config: </p>
  
  <pre><code>routes.MapRoute(
      "route1", 
      "/items", 
      new { controller = "Items", action = "Get" });
  
  routes.MapRoute(
      "route2", 
      "/items/{id}", 
      new { controller = "Items", action = "Get" });
  </code></pre>
  
  <p>But this route just doesn't work. Where am I wrong?</p>