C# Task使用CancellationTokenSource取消任务

CancellationTokenSource Source = new CancellationTokenSource();                  
            Task T = Task.Factory.StartNew(() =>
            {
             //如果Token被取消  
                while (!Source.IsCancellationRequested)
                {
                    Thread.Sleep(100);
                    Console.WriteLine("当前Thread正在运行{0}", Thread.CurrentThread.ManagedThreadId);
                }
            }, Source.Token);
            Thread.Sleep(1000);
            Source.Cancel();     

     CancellationTokenSource Source = new CancellationTokenSource();
             Source.Token.Register(() =>
             {
                 Console.WriteLine("当前的Source已经被取消");
             });
             Task T = Task.Factory.StartNew(() =>
             {
                 while (!Source.IsCancellationRequested)
                 {
                     Thread.Sleep(100);
                     Console.WriteLine("当前Thread正在运行{0}", Thread.CurrentThread.ManagedThreadId);
                 }
             }, Source.Token);
             Thread.Sleep(1000);
             Source.Cancel();

CancellationTokenSource Source = new CancellationTokenSource();
             Source.Token.Register(() =>
             {
                 Console.WriteLine("当前的Source已经被取消");
             });
             Task T = Task.Factory.StartNew(() =>
             {
                 while (!Source.IsCancellationRequested)
                 {
                     Thread.Sleep(100);
                     Console.WriteLine("当前Thread正在运行{0}", Thread.CurrentThread.ManagedThreadId);
                 }
             }, Source.Token);           
             //延时取消
             Source.CancelAfter(new TimeSpan(0, 0, 0, 5));

   //只要一个被取消，comineSource的组合就被取消，类似于WhenAny
               CancellationTokenSource Source = new CancellationTokenSource();
               Source.Cancel();
               CancellationTokenSource Source2 = new CancellationTokenSource();
               //comineSource 里面只要有一个被取消了，comineSource的状态就被取消
               var comineSource = CancellationTokenSource.CreateLinkedTokenSource(Source.Token, Source2.Token);             
               Console.WriteLine("s1={0},s2={1},s3={2}", Source.IsCancellationRequested, Source2.IsCancellationRequested, comineSource.IsCancellationRequested);