title: Reading specific config file
body: <p>I made my custom configuration classes to parse data from my config section.
  My project is class library which means it creates dll. I found this way to retrieve my config section:</p>
  
  <pre><code>return (ReportServerConfigurationSection)ConfigurationManager.GetSection(sectionGroup + "/" + sectionName);
  </code></pre>
  
  <p>But this only works for .exe applications.
  I waned to test my dll with specific config in some integration test but I cannot manage to read from correct config.</p>
  
  <p>How to read from app.dll.config file?</p>