gistfile1.txt

using System;
using System.Threading;
using System.Diagnostics;

namespace cpRepro41739
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("PPP:" + Process.GetCurrentProcess().Id);
            while (true)
            {
                var manualEvent = new ManualResetEvent(false);
                for (int i = 0; i < 10; i++)
                {
                    ThreadPool.QueueUserWorkItem(new WaitCallback(delegate
                    {
                        manualEvent.WaitOne();
                        Console.WriteLine("Place breakpoint here");
                    }));
                }
                Thread.Sleep(1000);
                manualEvent.Set();
            }
        }
    }
}