class Program
    {
        static void Main(string[] args)
        {
            Stopwatch timer1 = new Stopwatch();
            Stopwatch timer2 = new Stopwatch();
            timer1.Start();
            int max=10000000;
            ConcurrentQueue<int> intQueue = new ConcurrentQueue<int>();
            ConcurrentQueue<int> intQueueParallel = new ConcurrentQueue<int>();
            for (int i = 0; i < max; i++)
            {
                intQueue.Enqueue(i);
            }    
            //List< int> intList=intQueue.ToList<int>();
            timer1.Stop();
            Console.WriteLine("普通循环共耗时:" + timer1.Elapsed.TotalSeconds + "秒");
 
            timer2.Start();
            Parallel.For(0, max, (i) => intQueueParallel.Enqueue(i));
            //List<int> intListParallel = intQueueParallel.ToList<int>();
            timer2.Stop();
            Console.WriteLine("并行共耗时:"+timer2.Elapsed.TotalSeconds+"秒");
            Console.ReadKey();
        }
    }