title: Visual Studio "document outline" for C# file
body: <p>In <strong>Visual Studio</strong> (2013/2015/2017), the <strong>Document Outline window</strong> for <strong>C#</strong> files is always empty (&quot;There are no items to show for the selected document.&quot;).
  It seems that this functionality is not (not yet / no more) implemented.</p>
  <p>But then, how do I view the structure of the file? Is there any extension which implements this functionality?</p>
  <ul>
  <li>showing only the selected/opened file</li>
  <li>show regions</li>
  <li>move/rename members</li>
  <li>show documentation</li>
  </ul>
  <p><em>Using the Solution Explorer and Class View are NOT the solution.</em>
  In the old Visual Studio 2003, I did use a self written Add-In, because it was easy to read the structure. (There were also other tools but I cannot find them anymore). So I ask here which solution you know. :-)</p>
  <p>EDIT: Similar question also found:
  <a href="https://stackoverflow.com/questions/3793892/how-to-show-code-outline-in-visual-studio">How to show code outline in Visual Studio?</a></p>