Why isnt this thread slowing down?

Even when telling each of these threads to sleep for 100 million milliseconds, it still executes immediately. Why doesn't Sleep slow it down?

using System;using System.Collections.Generic;using System.Text;using System.Threading;namespace TestThreads{class Program {static void Main(string[] args) { ThreadStart operation =new ThreadStart(SimpleWork); Thread theThread =new Thread(operation); theThread.Start(); }static void SimpleWork() { Console.WriteLine("Thread: {0}", Thread.CurrentThread.ManagedThreadId); } }}

This works for me:

static void Main( string[] args )
{
ThreadStart operation = new ThreadStart( SimpleWork );
Thread theThread = new Thread( operation );
theThread.Start();
}

static void SimpleWork()
{
Thread.Sleep( 1000 ); // 1 second
Console.WriteLine( "Thread: {0}", Thread.CurrentThread.ManagedThreadId );
}