title: Which dll files of ASP.NET web application does IIS load?
body: <p>I couldn't find any information about it. Does anybody know whether IIS load all dlls in bin directory of web application or all dlls in any directory or maybe only directories referenced by project (in this case how it determines which dll is "master")?</p>
  
  <p>I've just had a situation where someone didn't remove all files from web application directory before deploying new version, while some dll was renamed. This redundant dll was in bin directory of MVC 4 web application.</p>