title: Create XmlRpcUrl Interface at runtime
body: <p>Currently I'm creating my XML-RPC using (xml-rpc.net) interfaces statically with the following statement:</p>
  
  <pre><code>[XmlRpcUrl("http://dillieodigital.wordpress.com/xmlrpc.php")]
  public interface ICSBlog : IMetaWeblog
  {
  }
  </code></pre>
  
  <p>However, I'd like to be able to specify the URL for the service at runtime, so I can dynamically switch to different services as needed.</p>
  
  <p>How would I go about doing this?</p>