Task启动的几种方式

		   var task = new Task(() =>
            {
                Console.WriteLine("工作线程" + Thread.CurrentThread.ManagedThreadId);
            });
            task.Start();
            //工厂
            Task.Factory.StartNew(() =>
            {
                Console.WriteLine("工作线程" + Thread.CurrentThread.ManagedThreadId);
            });

            Task.Run(() =>
            {
                Console.WriteLine("工作线程" + Thread.CurrentThread.ManagedThreadId);
            });


            //同步的方式
            task = new Task(() =>
            {
                Console.WriteLine("工作线程" + Thread.CurrentThread.ManagedThreadId);
            });
            //阻塞执行
            task.RunSynchronously();

Task阻塞方式和延续操作

下面开启2个线程

 Task task = new Task(() =>
            {
                Thread.Sleep(500);
                Console.WriteLine("工作线程1 " + DateTime.Now.ToString());
            });
            task.Start();
            Task task1 = new Task(() =>
            {
                Console.WriteLine("工作线程2 " + DateTime.Now.ToString());
            });
            task1.Start();

WaitAll

            //需要等待所有线程执行完毕,才会继续执行主线程
            Task.WaitAll(task, task1 );
            Console.WriteLine("主线程" + Thread.CurrentThread.ManagedThreadId);
            Console.ReadLine();

WaitAny

           //只要有一个Task执行完毕，就算完成，继续走主线程
            Task.WaitAny(task, task1);
            Console.WriteLine("主线程" + Thread.CurrentThread.ManagedThreadId);
            Console.ReadLine();

ContinueWith 不阻塞主线程，等两个线程执行完毕之后，执行延续任务

            //WhenAll 将task和task1执行完毕之后，在执行延续任务ContinueWith
            Task.WhenAll(task, task1).ContinueWith(t =>
            {
                Console.WriteLine("延续任务");
            });
            //WhenAll 执行完一个线程之后就开始执行延续任务
            Task.WhenAny(task, task1).ContinueWith(t =>
            {
                Console.WriteLine("延续任务");
            });
            Console.WriteLine("主线程" + Thread.CurrentThread.ManagedThreadId);
            Console.ReadLine();

Task工厂中的延续操作

           Task.Factory.ContinueWhenAll(new Task[2] { task, task1 }, (t) =>
            {
                Console.WriteLine("延续任务");
            });
           Task.Factory.ContinueWhenAny(new Task[2] { task, task1 }, (t) =>
            {
                Console.WriteLine("延续任务");
            });