using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var dt = DateTime.Now;

        var dt2 = dt.AddHours(23).AddMinutes(59);

        var dt3 = dt.Date.AddHours(23).AddMinutes(59);

        Console.WriteLine($"{dt}");

        Console.WriteLine($"{dt2}");

        Console.WriteLine($"{dt3}");

    }

}