System.TimeZone.GetUtcOffset C# (CSharp) Méthode

        public abstract TimeSpan GetUtcOffset(DateTime time);

	private void CET (TimeZone t1) 
	{
		Assert.AreEqual("CET", t1.StandardName, "A01");
		Assert.AreEqual("CEST", t1.DaylightName, "A02");
	
		DaylightTime d1 = t1.GetDaylightChanges (2002);
		Assert.AreEqual("03/31/2002 02:00:00", d1.Start.ToString ("G", CultureInfo.InvariantCulture), "A03");
		Assert.AreEqual("10/27/2002 03:00:00", d1.End.ToString ("G", CultureInfo.InvariantCulture), "A04");
		Assert.AreEqual(36000000000L, d1.Delta.Ticks, "A05");
	
		DaylightTime d2 = t1.GetDaylightChanges (1996);
		Assert.AreEqual("03/31/1996 02:00:00", d2.Start.ToString ("G", CultureInfo.InvariantCulture), "A06");
		Assert.AreEqual("10/27/1996 03:00:00", d2.End.ToString ("G", CultureInfo.InvariantCulture), "A07");
		Assert.AreEqual(36000000000L, d2.Delta.Ticks, "A08");
	
		DateTime d3 = new DateTime (2002,2,25);
		Assert.AreEqual(false, t1.IsDaylightSavingTime (d3), "A09");
		DateTime d4 = new DateTime (2002,4,2);
		Assert.AreEqual(true, t1.IsDaylightSavingTime (d4), "A10");
		DateTime d5 = new DateTime (2002,11,4);
		Assert.AreEqual(false, t1.IsDaylightSavingTime (d5), "A11");
	
		Assert.AreEqual(36000000000L, t1.GetUtcOffset (d3).Ticks, "A12");
		Assert.AreEqual(72000000000L, t1.GetUtcOffset (d4).Ticks, "A13");
		Assert.AreEqual(36000000000L, t1.GetUtcOffset (d5).Ticks, "A14");

		// Test TimeZone methods with UTC DateTime in DST.
		DateTime d6 = d4.ToUniversalTime ();
		Assert.AreEqual(false, t1.IsDaylightSavingTime (d6), "A15");
		Assert.AreEqual(0, t1.GetUtcOffset (d6).Ticks, "A16");
	}