using System;

using System.Threading;

public class Program

{

    public static void Main()

    {

        for (var i = 0; i < 5; i++) {

            var unixEpoch = new DateTime(1970, 1, 1);

            var doubleSeconds = DateTime.UtcNow.Subtract(unixEpoch).TotalSeconds;

            var longSeconds = (long) doubleSeconds;

​

            Thread.Sleep(600);

​

            var doubleSeconds2 = DateTime.UtcNow.Subtract(unixEpoch).TotalSeconds;

            var longSeconds2 = (long) doubleSeconds2;

​

            Console.WriteLine(doubleSeconds2 - doubleSeconds);

            Console.WriteLine(longSeconds2 - longSeconds);

            Console.WriteLine();

​

            Thread.Sleep(1000);

        }

    }

}