title: Red or green squiggly lines in Solution Explorer in VS 2013
body: <p>What are these green squiggly lines in VS 2013 Solution Explorer underlining solution name, project name and file name and how to remove them? I just opened the solution and no files are checked out or modified.</p>
  
  <p><img src="https://i.stack.imgur.com/4SYYP.png" alt="enter image description here"></p>
  
  <p>No code is underlined and no errors or warnings are detected by Visual Studio in the file:</p>
  
  <p><img src="https://i.stack.imgur.com/LpNZb.png" alt="enter image description here"></p>