DateTime date1 = new DateTime(1990, 8, 1, 0, 0, 0);
DateTime date2 = new DateTime(1990, 8, 1, 12, 0, 0);
int result = DateTime.Compare(date1, date2);
string relationship;
if (result < 0)
relationship = "is earlier than";
else if (result == 0)
relationship = "is the same time as";
else
relationship = "is later than";