title: Is it possible to manually flag files in the Solution Explorer in Visual Studio 2013
body: <p>I have a large number of business rule modules (C# code) in a solution folder and I want to keep track of which ones have been implemented.</p>
  
  <p>Every file has stub code but I want to be able to manually apply some sort of flag (like a bookmark) to the file in the Solution Explorer once I've coded it so I can see at a glance which ones are done.</p>
  
  <p>Is there a way of doing this in Visual Studio 2013? Failing that is there some sort of Visual Studio extension that would do the same?</p>