using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var input = DateTime.Now.Date;

        var otherDate = DateTime.Now;

        var otherDateFormatted = input.ToString("yyyy-MM-ddTHH:mm:ss.fffZ");

        Console.WriteLine(otherDateFormatted);

    }

}