C# TimeZone.isambiguustime，为什么它在GMT模糊时间失败？

我的服务器发送CEST时间，我需要在用户界面上显示从服务器接收到的CEST时间，DST开关除外。GMT中不明确的小时数应转换为GMT中不明确的小时数。也许下面的测试可以解释我的意图

[Test]
public void Should_process_server_time()
{
    var britishZone = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time");
    var germanZone = TimeZoneInfo.FindSystemTimeZoneById("Central European Standard Time");
    var firstAmbigiousMarchEntry = new DateTime(2011, 03, 27, 01, 00, 00);
    var secondAmbigiousMarchEntry = new DateTime(2011, 03, 27, 01, 30, 00);

    //Why does this fail even though 2011-03-27 01:00:00 is an ambigous time in GMT?
    Assert.That(britishZone.IsAmbiguousTime(firstAmbigiousMarchEntry));
    Assert.That(britishZone.IsAmbiguousTime(secondAmbigiousMarchEntry));

    var unAmbigiousFirstMarchEntry = TimeZoneInfo.ConvertTime(firstAmbigiousMarchEntry, germanZone, britishZone);
    var unAmbigiousSecondMarchEntry = TimeZoneInfo.ConvertTime(secondAmbigiousMarchEntry, germanZone, britishZone);

    Assert.That(britishZone.IsAmbiguousTime(unAmbigiousFirstMarchEntry), Is.False);
    Assert.That(britishZone.IsAmbiguousTime(unAmbigiousSecondMarchEntry), Is.False);

    Assert.That(unAmbigiousFirstMarchEntry.Hour == 2);
    Assert.That(unAmbigiousFirstMarchEntry.Minute == 0);
    Assert.That(unAmbigiousFirstMarchEntry.Second == 0);

    Assert.That(unAmbigiousSecondMarchEntry.Hour == 2);
    Assert.That(unAmbigiousSecondMarchEntry.Minute == 30);
    Assert.That(unAmbigiousSecondMarchEntry.Second == 0);

}

请问你能帮忙吗？我的目的是将英国区域中的模糊时间转换为英国区域中的明确时间，即2011-03-27 01:00:00至2011-03-27 02:00:00。为此，我需要确定接收到的日期时间在GMT区域中是否模糊，但呼叫失败。 我的系统在英国地区设置下运行

我尝试了下面的测试，它通过了。现在我很困惑，

IsInvalidTime

和

IsAmbigoustime

在GMT区域有什么区别

[Test]
public void Should_process_server_time()
{
    var britishZone = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time");
    var germanZone = TimeZoneInfo.FindSystemTimeZoneById("Central European Standard Time");
    var firstAmbigiousMarchEntry = new DateTime(2011, 03, 27, 01, 00, 00);
    var secondAmbigiousMarchEntry = new DateTime(2011, 03, 27, 01, 30, 00);

    Assert.That(britishZone.IsInvalidTime(firstAmbigiousMarchEntry));
    Assert.That(britishZone.IsInvalidTime(secondAmbigiousMarchEntry));

    var unAmbigiousFirstMarchEntry = TimeZoneInfo.ConvertTime(firstAmbigiousMarchEntry, germanZone, britishZone);
    var unAmbigiousSecondMarchEntry = TimeZoneInfo.ConvertTime(secondAmbigiousMarchEntry, germanZone, britishZone);

    unAmbigiousFirstMarchEntry = unAmbigiousFirstMarchEntry.AddHours(2);
    unAmbigiousSecondMarchEntry = unAmbigiousSecondMarchEntry.AddHours(2);

    Assert.That(britishZone.IsAmbiguousTime(unAmbigiousFirstMarchEntry), Is.False);
    Assert.That(britishZone.IsAmbiguousTime(unAmbigiousSecondMarchEntry), Is.False);

    Assert.That(unAmbigiousFirstMarchEntry.Hour == 2);
    Assert.That(unAmbigiousFirstMarchEntry.Minute == 0);
    Assert.That(unAmbigiousFirstMarchEntry.Second == 0);

    Assert.That(unAmbigiousSecondMarchEntry.Hour == 2);
    Assert.That(unAmbigiousSecondMarchEntry.Minute == 30);
    Assert.That(unAmbigiousSecondMarchEntry.Second == 0);
}

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你也认为这可以更好地实施吗？

我认为答案是GMT从来都不是含糊不清的。GMT总是+0。伦敦的时区称为西欧时间，冬季为+0，夏季为+1。

准确地说。GMT总是GMT。它没有夏令时。例如：瑞典时间在冬季为GMT+1，夏季为GMT+2。WET与GMT同义，始终为UTC+0，与GMT相同。在夏季，大多数使用WET的国家切换到西部/BST，即UTC+1。如果是这样的话，为什么这个测试通过了（请看我的主要问题的编辑）？问题是在GMT时区上，无效时间和模糊时间有什么区别？