// compile in release mode
bool stop = false;
bool toggle = false;
ThreadPool.QueueUserWorkItem(delegate
{
    while (!stop)
    {
        toggle = !toggle;
        //Thread.MemoryBarrier();
    }

class Program
{
    static void Main(string[] args)
    {
        bool isComplete = false;
        var t = Task.Factory.StartNew(() =>
        {
            bool toggle = false;
            while (!isComplete) // read the cached value
            {

using System.Security;
using System.Threading.Tasks;
using System.Threading;
 
namespace Tpl.Samples
{
    class Program
    {
        [DllImport("Kernel32.dll"), SuppressUnmanagedCodeSecurity]
        public static extern int GetCurrentProcessorNumber();