Gets a value indicating whether the time zone has any daylight saving time rules.
using System; using System.Collections.ObjectModel; public class Example { public static void Main() { ReadOnlyCollection<TimeZoneInfo> zones = TimeZoneInfo.GetSystemTimeZones(); foreach(TimeZoneInfo zone in zones) { if (! zone.SupportsDaylightSavingTime) Console.WriteLine(zone.DisplayName); } } }