title: What options do I have for implementing custom code issues and fixes in Visual Studio 2012 and above?
body: <p>I have experimented with implemented Roslyn Code Issues and Fixes in Visual Studio 2013 when they discussed it in BUILD 2014.</p>
  
  <p>We want to be able to right custom rules that will cause either compiler errors or warning and additionally if possible give visual feedback in Visual Studio.</p>
  
  <p>If possible, it would be nice to provide this in VS2012 and later, but the last time I checked, the ability to do this through Roslyn was in 2013 and later.</p>
  
  <p>I do not have any specific attachment to Roslyn, but I am not aware of the ability to do this elsewhere.</p>
  
  <p>Is there any other way to provide custom code issues and fixes int he IDE, or is it only through Roslyn in 2013?</p>