using System;

using System.Diagnostics;

using System.Threading;

public class Program

{

    public static void Main()

    {

        for(var i = 0; i < 100; i++)

        {

            var sw = Stopwatch.StartNew();

            Thread.Sleep(1);

            sw.Stop();

            Console.WriteLine($"time : {sw.ElapsedMilliseconds}ms");

        }

    }

}

​