title: Visual Studio 2017 lost intellisense and coloring with #else directive
body: <p>I just started to use preprocessor directive in my code on VS 2017 and how somehow the editor lost its intellisense and coloring within the #else directive...I can't find anything from Google.  Thanks!
  <a href="https://i.stack.imgur.com/A4RoM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/A4RoM.png" alt="enter image description here"></a></p>