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");

    }

}

​