title: Visual Studio solution explorer incorrectly identifies classes as custom controls
body: <p>I have a project in Visual Studio which is misidentifying some of the files as 'user controls' as opposed to code-only classes. The project compiles and runs just fine, but it does leave a slightly annoying issue that when these files are double-clicked, the designer window is presented instead of the code editor.</p>
  
  <p>Obviously, there are plenty of ways to get to the editor but, firstly it's annoying, and secondly, I don't know if this could lead to other issues later down the road so I'd like to resolve the problem sooner rather than later.</p>
  
  <p>As you can see from the screenshot, there are 5 files, all of which are code-only classes, yet 4 of them are identified as custom-controls by the solutions explorer; only the final one is identified correctly.</p>
  
  <p><a href="https://i.stack.imgur.com/zp84X.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zp84X.png" alt="Only SignalRManager.vb is correctly identified"></a></p>
  
  <p><a href="https://i.stack.imgur.com/o22i4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/o22i4.png" alt="No additional Designer Files"></a></p>