Something like this ought to do it

string[] times = {"16:00:00", "18:00:00", "22:30:30"};
List<DateTime> dates = new List<DateTime>(times.Length);
foreach (string t in times)
{
    dates.Add(new DateTime(1735, 1, 1) + TimeSpan.Parse(t));
}

I assume it was a typo that turned 22:30 into 23:30.

Mattias

Best?  I don't know.  I can tell you what I'd probably do: use the time to  
instantiate a DateTime object using Parse(), and then use the resulting  
DateTime object's hour, minute, and second properties as part of the  
instantiation of a new DateTime object to put in your List<>.

Pete

Here's an example, I am sure there are other ways....

       private IList<DateTime> ConvertToDateTimeList(string[] datetime)
       {
           return Array.ConvertAll(datetime, new Converter<string,
DateTime>(StringToDate));
       }

       private DateTime StringToDate(string dateTime)
       {
           return DateTime.Parse(dateTime);
       }

Or this...

       private IList<DateTime> ConvertToIList(string[] datetime)
       {
           return Array.ConvertAll(datetime, new Converter<string,
DateTime>(DateTime.Parse));
       }

-Pramod