title: Resolving "this operation requires IIS integration pipeline mode" in ASP.net MVC2
body: <p>I'm developing an ASP.net MVC2 application, and implement an export to .csv controller action, but when I add the headers to force the download, The following appears in the debugger:</p>
  
  <blockquote>
    <p>"this operation requires IIS integration pipeline mode"</p>
  </blockquote>
  
  <p>I have searched on numerouse sites with Google, but have yet to resolve this. I am using:</p>
  
  <ul>
  <li>IIS 7.5</li>
  <li>Windows 7 Ultimate and </li>
  <li>.Net Framework 4.0, </li>
  </ul>
  
  <p>The application pools for ASP.net are configured in integrated pipeline mode, as I don't understand the problem.</p>
  
  <p>Can the community assist me solving this and explaining the error to me?</p>