invalid timespan for time string in C# : <p>I'm trying to add a string that represents a time to a c# datetime object but I'm getting a exception that says 'invalid format'</p>

<pre><code>details.UTCEventDate.Add(TimeSpan.Parse(details.UTCEventTime));
</code></pre>

<p>where 'details.UTCEventTime' is something like "4:45AM"</p>
