using System;

public class Program

{

    public static void Main()

    {

        var addHours = 1;

        var addMinutes = 40;

        var date = DateTime.UtcNow;

        var date2 = date.AddHours(1);

        var date3 = date.AddMinutes(40);

        Console.WriteLine(date3.ToString("yyyy-MM-ddTHH:mm:ss.000Z"));

    }

}