title: Exclude file from StyleCop analysis: "auto-generated" tag is ignored
body: <p>At the beginning of a C# file, I have added:</p>
  
  <pre><code>//-----------------------------------------------------------------------
  // &lt;copyright company="SomeCompany" file="MyFile.cs"&gt;
  // Copyright © Some Company, 2011
  // &lt;/copyright&gt;
  // &lt;auto-generated /&gt;
  //-----------------------------------------------------------------------
  </code></pre>
  
  <p>I want StyleCop to skip checking this file, so I used the <code>auto-generated</code> trick explained in <a href="https://stackoverflow.com/questions/4164928/how-to-suppress-code-analysis-on-generated-code/4592847#4592847">other answers</a>.</p>
  
  <p>However, after cleaning and rebuilding my solution, StyleCop keeps generating warnings for this file. Why does this happen? How can it be fixed?</p>
  
  <p>I am using Microsoft Visual Studio 2008 Professional Edition and StyleCop v4.3.</p>