title: Inconsistent length calculation in projection snapshot
body: <p>In Visual Studio 2017 something unexpected happened when I was working. I was editing razor view (nothing special, just normal editing - I've copy pasted small chunk of text) and all the sudden I've got this message:</p>
  
  <p><a href="https://i.stack.imgur.com/kXjp6.png" rel="noreferrer"><img src="https://i.stack.imgur.com/kXjp6.png" alt="enter image description here"></a></p>
  
  <p>I've tried to restart visual studio, delete suo file, delete my temporary folder... now I can not work inside this particular view. If I try to change anything in this .cshtml I got message above or this message:</p>
  
  <p><a href="https://i.stack.imgur.com/LZeYh.png" rel="noreferrer"><img src="https://i.stack.imgur.com/LZeYh.png" alt="enter image description here"></a></p>
  
  <p>What is this? I don't recall seeing this in previous versions of visual studio. How to avoid this and proceed with work?</p>