title: How can I profile Signed Assemblies with VS 2010 or VS 2013
body: <p>I have a website that uses AjaxControlToolkit.dll and Log4Net.dll.</p>
  
  <p>When I try to run the performance profiling tool in VS 2010 on it it gives me the following warning:</p>
  
  <blockquote>
    <p>AjaxControlToolkit.dll is signed and instrumenting it will invalidate its signature. If you proceed without a post-instrument event to re-sign the binary it may not load correctly.</p>
  </blockquote>
  
  <p>Now, if I choose the option to continue without re-signing, the profiling starts but the assembly doesn't load and gives an ASP.NET exception.</p>