public class demo

    {

        public int ID { get; set; }

        public string Name { get; set; }

        public int State { get; set; }

        public string DownFrom { get; set; }

    }

 static List<demo> listdemo = new List<demo>();

   public static void add()

        {



            for (int i = 0; i < 100; i++)

            {

                demo dm = new demo { ID = i, Name = "Test" + i, DownFrom = "中国", State = 0 };

                listdemo.Add(dm);

                           

            }}

    public static void read(List<demo> listthread)

        {

           // lock (listthread)

           // {



            foreach (var dm in listthread)

            {

                Console.WriteLine(dm.ID + "\t" + dm.Name + "\t" + dm.DownFrom + "\t线程" + Task.CurrentId));

                Thread.Sleep(1000);

           // }

            }

        }

 static void Main(string[] args)

        {

    Task parent = new Task(() =>

            {

                CancellationTokenSource cts = new CancellationTokenSource();

                var tf = new TaskFactory(cts.Token,

                TaskCreationOptions.AttachedToParent, TaskContinuationOptions.ExecuteSynchronously, TaskScheduler.Default);

              tf.StartNew(() => read(list[0],(int)Task.CurrentId)).ContinueWith(TaskEnded);

          &