title: Visual Studio 2015 hangs when typing code in a large C# file
body: <p>I've already seen this question: <a href="https://stackoverflow.com/questions/28530530/visual-studio-is-waiting-for-internal-operation-to-complete">Visual studio is waiting for internal operation to complete</a> so please don't mark this as a duplicate.</p>
  
  <p>I have a large C# code file that seeds a database with about 2000 location entities and 1000 category entities. This file necessarily has several thousand variables declared. Whenever I try to type any more code into this file, Visual Studio hangs with the message: <strong>Visual studio is busy: Microsoft Visual studio is waiting for internal operation to complete.</strong></p>
  
  <p>This only happens when typing in code in this particular large file, e.g. if I type <code>string</code>, and then hit space, Visual Studio freezes. Because <code>string</code> and a space will be immediately be underlined with a red squiggly line and an error until you finish the code statement, is it possible that this might have something to do with the static type checker not being able to handle large files, or some other natural limit or bug?</p>
  
  <p>Things I've tried so far:</p>
  
  <ul>
  <li>Deleting the ".vs" folder on the project root </li>
  <li>Delete the .suo file in the project root</li>
  <li>Repairing Visual Studio</li>
  <li>Reinstalling Visual Studio</li>
  </ul>
  
  <p>I'm using Visual Studio 2015 Community Update 3.</p>