title: Multi-line style comments causing XML documentation warning
body: <p>I have many multi-line style comments in a C# project and when the project option is set to output a XML documentation file they all trigger the warning <em>XML comment is not placed on a valid language element</em>. This behaviour is observed in Visual Studio 2010.</p>
  
  <p>Short of changing all these comments to single-line style comments what can I do to prevent these warnings from being triggered?</p>
  
  <p>Reduced example:</p>
  
  <pre><code>public class Foo
  {
      /// &lt;summary&gt;
      /// Does something.
      /// &lt;/summary&gt;
      public void DoSomething()
      {
          /**
           * Do something interest here.
           */
      }
  }
  </code></pre>