title: Mapping value of a parameter in querystring to a DTO property
body: <p>I am trying to find a way to get the value in this querystring to my DTO object. </p>
  
  <pre><code>example.org?code=abc
  </code></pre>
  
  <p>I have to map value of code to AuthorizationCode property (parameter names don't match either). I tried routing like this but it doesn't work.</p>
  
  <pre><code>[Route("?code={AuthorizationCode}", "GET")]
  public class Registration
  {
      public string AuthorizationCode { get; set; }
  }
  </code></pre>
  
  <p>Since this is a callback URL, I don't have a chance to change it. How can I accomplish this?</p>