`TimeSpan nowFromCent=DateTime.Now-new DateTime(2000, 01, 01, 01, 01, 0);
double nowSecondsCent=nowFromCent.TotalMilliseconds;
TimeSpan localStartTimeFromCent=localStartTime-new DateTime(2000, 01, 01, 01, 01, 0);
double startSeconds=localStartTimeFromCent.TotalMilliseconds;
TimeSpan endTimeFromCent=localEndTime-new DateTime(2000, 01, 01, 01, 01, 0);
double endSeconds=endTimeFromCent.TotalMilliseconds;`