反序列化DateTimeFormatInfothrowing“不是给定区域性的有效日历。”

我正在序列化DateTimeFormatInfo,并在反序列化时收到异常“不是给定区域性的有效日历”。从检查 .net source

问:我序列化/反序列化是错误的,还是这是一个bug?

4.7.2中要重新编程的源:

using System;
using System.Globalization;
using System.IO;

public static class Module1
{
    public static void Main()
    {
        System.Globalization.CultureInfo currentCulture;
        currentCulture = System.Globalization.CultureInfo.CreateSpecificCulture("en-US");
        // currentCulture.OptionalCalendars includes Localized and USEnglish
        currentCulture.DateTimeFormat.Calendar = new GregorianCalendar(GregorianCalendarTypes.USEnglish);

        System.Xml.Serialization.XmlSerializer x;
        x = new System.Xml.Serialization.XmlSerializer(typeof(DateTimeFormatInfo), new[] { typeof(GregorianCalendar) });

        // Serialize
        string xml;
        using (MemoryStream writer = new MemoryStream())
        {
            x.Serialize(writer, currentCulture.DateTimeFormat);
            writer.Position = 0;
            using (var reader = new StreamReader(writer))
            {
                xml = reader.ReadToEnd();
            } // reader
        } // writer

        // Deserialize
        using (StringReader stringReader = new StringReader(xml))
        {
            // This will throw an exception because the invariant culture which was used in the parameterless constructor doesn't have USEnglish in OptionalCalendars
            x.Deserialize(stringReader);
        } // stringReader

        Console.WriteLine("ok");
    }
}

这是一个 fiddle