title: Create FxCop .ruleset file using free tools
body: <p>How can I create a .ruleset file for FxCop, using only MSVS 10 Professional edition and free tools such as FxCopIntegrator?</p>
  
  <p>The only graphical tool I found is FxCop GUI which allows to choose rules. That rule selection results in creating a ".fxcop" file. But FxCopIntegrator, while providing ability to specify own rule set, requires another file format (".ruleset")</p>
  
  <p>I've found no way to convert .fxcop files to .ruleset. ".FxCop" contains rule names, ".ruleset" contains numbers like "CA1xxx". </p>
  
  <p>Have I missed some obvious way to do that? Can it be done at all?</p>