Difference Between Dates/Times Including Daylight Savings Time

System.DateTime StartTime = DateTime.SpecifyKind(3/8/2009 1:59:00 AM, DateTimeKind.Local);
System.DateTime EndTime = DateTime.SpecifyKind(3/8/2009 3:01:00 AM, DateTimeKind.Local);
TimeSpan TimeDifference = EndTime.ToUniversalTime - StartTime.ToUniversalTime;
ulong MinutesBetweenTimes = DateDiff(DateInterval.Minute, StartTime.ToUniversalTime, EndTime.ToUniversalTime);