title: WCF and optional parameters
body: <p>I just started using WCF with REST and UriTemplates. Is it now possible to use optional parameters? </p>
  
  <p>If not, what would you guys recommend I do for a system that has three parameters that are always used in the url, and others that are optional (varying amount)?</p>
  
  <p>Example:</p>
  
  <pre><code>https://example.com/?id=ID&amp;type=GameID&amp;language=LanguageCode&amp;mode=free 
  </code></pre>
  
  <ul>
  <li>id, type, language are always present  </li>
  <li>mode is optional</li>
  </ul>