title: Why is C# code partially greyed out in the Visual Studio 2015 editor?
body: <p>This is how sample C# code looks in my VS 2015 configuration:</p>
  
  <p><a href="https://i.stack.imgur.com/jFCv3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jFCv3.png" alt="enter image description here"></a></p>
  
  <p>The statements in the rectangles are greyed-out.  What is the meaning for this?  <a href="https://stackoverflow.com/a/32144170/360840">Per this SO answer</a>, I know that there are rules under References->Analyzers, but I cannot tell which active rule produces this result.</p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>Per Hans Passant's guidance:</p>
  
  <p><a href="https://i.stack.imgur.com/O3Ree.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/O3Ree.png" alt="enter image description here"></a></p>