DateTimeOffset instance value comparisons honor the time zone difference.
ToUniversalTime/ToLocalTime methods return a DateTimeOffset representing the same point in time, but with a UTC or local offset.
using System; class MainClass/*from w ww . j av a2 s . co m*/ { public static void Main(string[] args) { DateTimeOffset local = DateTimeOffset.Now; DateTimeOffset utc = local.ToUniversalTime(); Console.WriteLine (local.Offset); Console.WriteLine (utc.Offset); Console.WriteLine (local == utc); //To include the Offset in the comparison, you must use the EqualsExact method: Console.WriteLine (local.EqualsExact (utc)); } }