聽說讀寫

internal static class StrangeBehavior
{
    // As you'll see later, mark this field as volatile to fix the problem
    private static Boolean s_stopWorker = false;
    public static void Main()
    {
        Console.WriteLine("Main: letting worker run for 5 seconds");
        Thread t = new Thread(Worker);
        t.Start();
        Thread.Sleep(5000);
        s_stopWorker = true;
        Console.WriteLine("Main: waiting for worker to stop");
        t.Join();
    }
    private static void Worker(Object o)
    {
        Int32 x = 0;
        while (!s_stopWorker) x++;
        Console.WriteLine("Worker: stopped when x={0}", x);
    }
}