Parse Custom DateTime
<p>I'm having trouble parsing this datetime:</p>

<pre><code>        DateTime ParseDateTime(string dateString)
        {
            //dateString is "2011-07-22 16:11:14,770"
            var format = "yyyy-MM-dd hh:mm:ss,fff";
            var dateTime = DateTime.ParseExact(dateString, format, CultureInfo.InvariantCulture);
            return dateTime;
        } 
</code></pre>

<p>What am I doing wrong?</p>
