title: DateTime.ParseExact throwing format exception
body: <p>I have a date in the following format "hh:mm:ss:ffff dd/MM/yy" (for example..."20:58:54:5854 28/07/07") but when I try to parse that with DateTime.ParseExact it fails with a format exception.</p>
  
  <p>My exact line of code is...</p>
  
  <pre><code>var time = DateTime.ParseExact(timeString, "hh:mm:ss:ffff dd/MM/yy", CultureInfo.InvariantCulture);
  </code></pre>
  
  <p>Thanks
  Ben</p>