用Task代替TheadPool

TheadPool的问题

1. 不支持线程的取消、完成、失败通知等交互性操作
2. 不支持线程执行先后次序

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var p = new Program();
            p.Task();
            Console.ReadKey();
            p.Signal();
            Console.ReadKey();
        }

        CancellationTokenSource cts = new CancellationTokenSource();

        void Task()
        {
            var random = new Random();
            for (int i = 0; i < 100; i++)
            {
                var worker = new Task(() =>
                {
                    while (true)
                    {
                        if (random.Next(100) % 2 == 1)
                        {
                            if (cts.IsCancellationRequested)
                            {
                                break;    
                            }
                            
                        }
                        else
                        {
                            cts.Token.ThrowIfCancellationRequested(); //异常取消
                        }
                        Thread.Sleep(100);
                    }
                });
                worker.Start();
                worker.ContinueWith(task =>
                {
                    Console.WriteLine("IsCancele={0},IsCompleted={1},IsFaulted={2}", task.IsCanceled, task.IsCompleted, task.IsFaulted);
                });
            }

        }

        void Signal()
        {
            cts.Cancel();
        }
    }
}