title: ASP.NET Build Error : The type exists in both dlls
body: <p>While building my project, I got the below error message.</p>
  
  <blockquote>
    <p>The type 'tracker_ascx' exists in both
    'AppData\Local\Temp\190\Temporary ASP.NET
    Files\root\web_tracker.ascx.7a9a6bd4.fnv2mhdj.dll' and
    'AppData\Local\Temp\190\Temporary ASP.NET
    Files\root\web_tracker.ascx.7a9a6bd4.pxdl7dxj.dll'.</p>
  </blockquote>
  
  <p>The application runs in <code>.NET Framework 4.0</code></p>