关于Task的线程窃取

示例代码：

        static void Main(string[] args)
        {
            ThreadPool.SetMaxThreads(4, 1000);
            object locker = new object();
            const int TaskCount = 10;

            Task main = Task.Run(() =>
            {
                var mainTid = Thread.CurrentThread.ManagedThreadId;
                Console.WriteLine("Main TID:{0}", mainTid);
                Thread.Sleep(1000);

                Task[] tasks = new Task[TaskCount];
                for (int i = 0; i < TaskCount; i++)
                {
                    tasks[i] = Task.Run(() =>
                    {
                        var tid = Thread.CurrentThread.ManagedThreadId;
                        lock (locker)
                        {
                            if (mainTid == tid)
                                Console.ForegroundColor = ConsoleColor.Red;
                            Console.WriteLine(tid);
                            if (mainTid == tid)
                                Console.ForegroundColor = ConsoleColor.Gray;
                        }
                        Thread.Sleep(1000);
                    });
                }
                Task.WaitAll(tasks);
            });
            main.Wait();
        }