title: Castle Windsor - Null constructor argument
body: <p>How can I pass a null constuctor argument using Castle Windsor? I thought the following would work</p>
  
  <pre><code>&lt;parameters&gt;
    &lt;repository&gt;null&lt;/repository&gt;
    &lt;message&gt;null&lt;/message&gt;
  &lt;/parameters&gt;`
  </code></pre>