title: Order property in System.Web.Http.AuthorizeAttribute
body: <p>If I have multiple authorization attributes on an action, my understanding is that for <code>System.Web.Mvc.AuthorizeAttribute</code> I can specify the <code>Order</code> property like:</p>
  
  <pre><code>[CustomAuth(Order=2)]
  [CustomAuth(Order=1)]
  public ActionResult Get() { }
  </code></pre>
  
  <p>But this doesn't exist in the authorize attribute in the Web API. How do I order the execution of the attributes in the Web API?</p>
  
  <p>Also, does the attribute at the class level always take precedence over the attribute that decorates the action?</p>