c# real-time

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;

namespace Test_time
{
    public static class Program
    {
        public static void Main(string[] args)
        {
            Stopwatch sw = new Stopwatch();

            for (int i = 0; i < 10; ++i)
            {
                sw.Reset();
                sw.Start();
                Thread.Sleep(50);
                sw.Stop();

                Console.WriteLine("(default) Slept for " + sw.ElapsedMilliseconds);

                TimeBeginPeriod(1);
                sw.Reset();
                sw.Start();
                Thread.Sleep(50);
                sw.Stop();
                TimeEndPeriod(1);

                Console.WriteLine("(highres) Slept for " + sw.ElapsedMilliseconds + "\n");
            }
        }

        [DllImport("winmm.dll", EntryPoint="timeBeginPeriod", SetLastError=true)]
        private static extern uint TimeBeginPeriod(uint uMilliseconds);

        [DllImport("winmm.dll", EntryPoint="timeEndPeriod", SetLastError=true)]
        private static extern uint TimeEndPeriod(uint uMilliseconds);
    }
}