title: Why does Code Analysis not warn about NotImplementedException?
body: <p>I'm pretty sure that previous versions of Visual Studio Code Analysis warned about the use of NotImplementedException, i.e. any member that contained this</p>
  
  <pre><code>throw new NotImplementedException();
  </code></pre>
  
  <p>would give a CA warning.</p>
  
  <p>This doesn't seem to be the case with Visual Studio 2008.</p>
  
  <p>Was that particular rule removed, or am I just imagining that it ever existed?</p>