Csharp Windows 10上埃及标准时间的时区偏移不正确

我正在try 将UTC日期转换为"埃及标准时间"，但根据操作系统版本的不同，夏季时间的计算偏移量会有所不同:

• 在Windows 10上，偏移量为+2
• 在Windows 11上，偏移量为+3(这是正确的偏移量)

这是我用于转换的代码:

TimeZoneInfo timeZone = TZConvert.GetTimeZoneInfo("Egypt Standard Time");
DateTimeOffset initialLocalTime = TimeZoneInfo.ConvertTime(dateTimeUtc, timeZone);

DateTimeUtc的类型为DateTimeOffset，值为:

    {10/14/2023 9:00:00 PM +00:00}
    Date: {10/14/2023 12:00:00 AM}
    DateTime: {10/14/2023 9:00:00 PM}
    Day: 14
    DayOfWeek: Saturday
    DayOfYear: 287
    Hour: 21
    LocalDateTime: {10/15/2023 12:00:00 AM}
    Millisecond: 0
    Minute: 0
    Month: 10
    Offset: {00:00:00}
    Second: 0
    Ticks: 638329140000000000
    TimeOfDay: {21:00:00}
    UtcDateTime: {10/14/2023 9:00:00 PM}
    UtcTicks: 638329140000000000
    Year: 2023

这就是结果:

{10/14/2023 11:00:00 PM +02:00}
Date: {10/14/2023 12:00:00 AM}
DateTime: {10/14/2023 11:00:00 PM}
Day: 14
DayOfWeek: Saturday
DayOfYear: 287
Hour: 23
LocalDateTime: {10/15/2023 12:00:00 AM}
Millisecond: 0
Minute: 0
Month: 10
Offset: {02:00:00}
Second: 0
Ticks: 638329212000000000
TimeOfDay: {23:00:00}
UtcDateTime: {10/14/2023 9:00:00 PM}
UtcTicks: 638329140000000000
Year: 2023

在结果中，偏移量是+2，应该是+3.

我发现最近Daylight saving time in Egypt被更改了，我想这就是Windows 10不能正常工作的原因.

如何在所有操作系统上正确计算此时区的偏移量？ 为了获得正确的偏移量，我应该调用一些外部服务吗？