using System;

using Newtonsoft.Json;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(DateTime.Now.ToString("yyyy-MM-dd'T'HH:mm:ss.fffzzz", DateTimeFormatInfo.InvariantInfo));

        Console.WriteLine(JsonConvert.SerializeObject(new DateTimeOffset(DateTime.Now)));

    }

}