public void TestTzIdToWindowsTimeZoneMappingMethods() { TimeZoneInfo timeZoneInfo = TimeUtils.GetTimeZoneInfoForTzId("Australia/Sydney"); Assert.AreEqual("AUS Eastern Standard Time", timeZoneInfo.Id); string tzId = timeZoneInfo.ToTzId(); Assert.AreEqual("Australia/Sydney", tzId); IEnumerable <string> tzIds = timeZoneInfo.GetAllTzIds(); Assert.AreEqual(2, tzIds.Count()); Assert.IsTrue(tzIds.Contains("Australia/Sydney")); Assert.IsTrue(tzIds.Contains("Australia/Melbourne")); }