title: DateTime parse with custom format
body: <p>I am trying to parse a datetime value using this:</p>
  
  <pre><code>DateTime insertedDateTime = DateTime.ParseExact(tokens[0] + " " + tokens[1], "yyyy-MM-dd mm:hh:ss", CultureInfo.InvariantCulture);
  
  //tokens[0] = 2013-09-05 
  //tokens[1] = 07:23:32
  </code></pre>
  
  <p>I am getting this error:</p>
  
  <blockquote>
    <p><em>String was not recognized as a valid DateTime.</em></p>
  </blockquote>
  
  <p>Any help would be appreciated.</p>