using System;

using System.Diagnostics;

using System.Xml;

using System.Xml.Serialization;

using System.Collections.Generic;

using System.Text;

using System.IO;

​

public class Program

{

    public static void Main()

    {

        string timeString ="12/28/2019 15:30:01";       

        Console.WriteLine($"Date: {timeString}");       

        var dateTimeDemo1=new DateTimeDemo();       

        dateTimeDemo1.DemoTime = DateTime.Parse(timeString);    

        Console.WriteLine(dateTimeDemo1);

        Console.WriteLine(new string('-', 140 ));

        dateTimeDemo1.DemoTime = DateTime.SpecifyKind(dateTimeDemo1.DemoTime, DateTimeKind.Local);

        Console.WriteLine(dateTimeDemo1);

        dateTimeDemo1.DemoTime = DateTime.SpecifyKind(dateTimeDemo1.DemoTime, DateTimeKind.Utc);

        Console.WriteLine(dateTimeDemo1);

        dateTimeDemo1.DemoTime = DateTime.SpecifyKind(dateTimeDemo1.DemoTime, DateTimeKind.Unspecified);        

        Console.WriteLine(dateTimeDemo1);

    }

}

​

[Serializable]

public class DateTimeDemo

{

    [XmlAttribute]

    public DateTime DemoTime

    {

        get;

        set;

    }

​

    [XmlAttribute]

    public DateTimeKind Kind

    {

        get

        {

            return DemoTime.Kind;

        }

    }

    public override string ToString()

    {

        return $"Date: {DemoTime,-25} Kind: {Kind,-15} XML: {SerializationHelper.XmlSerialize(this)}";      

    }

}

​

public static class SerializationHelper

{

    public static string XmlSerialize<T>(T obj)

    {

        if (EqualityComparer<T>.Default.Equals(obj, default(T)))

            return null;

        var xmlSerializer = new XmlSerializer(typeof(T));

        var settings = new XmlWriterSettings{OmitXmlDeclaration = true, ConformanceLevel = ConformanceLevel.Auto};

          XmlSerializerNamespaces ns = new XmlSerializerNamespaces();

          ns.Add("", "");

        using (Utf8StringWriter stringWriter = new Utf8StringWriter())

        {

            using (XmlWriter writer = XmlWriter.Create(stringWriter, settings))

            {

                xmlSerializer.Serialize(writer, obj, ns);

                return stringWriter.ToString();

            }

        }

    }

}

​

public class Utf8StringWriter : StringWriter

{

    public override Encoding Encoding

    {

        get

        {

            return Encoding.UTF8;

        }

    }

}