title: How do I convert a DateTime object to YYMMDD format?
body: <p>Um, probably a really simple question, but I just noticed that I have no idea on how to convert <code>DateTime.Now</code> to the format YYMMDD, so for example today (5. November 2009) would be "091105". </p>
  
  <p>I know there are overloads to <code>DateTime.Now.ToString()</code> where you can pass in a format string, but I have not found the right format e.g. for short year format (09 instead of 2009).</p>