public static class TaskDemo01

    {

        public static void Run()

        {

            Console.WriteLine("【Debug】主 线程ID:" + Thread.CurrentThread.ManagedThreadId);

            string str1 = string.Empty, str2 = string.Empty, str3 = string.Empty;

            var task1 = Task.Run(() =>

            {

                Thread.Sleep();

                str1 = "姓名：张三,";

                Console.WriteLine("【Debug】task1 线程ID:" + Thread.CurrentThread.ManagedThreadId);

            }).ContinueWith(t =>

            {

                Thread.Sleep();

                str2 = "年龄：25,";

                Console.WriteLine("【Debug】task2 线程ID:" + Thread.CurrentThread.ManagedThreadId);

            }).ContinueWith(t =>

            {

                Thread.Sleep();

                str3 = "爱好：妹子";

                Console.WriteLine("【Debug】task3 线程ID:" + Thread.CurrentThread.ManagedThreadId);

            });

            //Thread.Sleep(2500);//其他逻辑代码

            task1.Wait();

            Console.WriteLine(str1 + str2 + str3);

            Console.WriteLine("【Debug】主 线程ID:" + Thread.CurrentThread.ManagedThreadId);

        }

    }

    public static class TaskDemo02

    {

        /// <summary>

        /// 整个方法只需用 5 秒即可执行完毕！

        /// </summary>

        public static void Run()

        {

            Console.WriteLine(string.Format("当前时间：{0}，主线程方法开始...！", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));

            var task = Task.Run(() =>

            {

                Thread.Sleep();//假设这是个访问数据库的方法

                Console.WriteLine(string.Format("当前时间：{0}，Task方法体内部执行完毕！", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));

            });

            Console.WriteLine(string.Format("当前时间：{0}，主线程方法已经注入 Task.Run 方法，即将休眠 2 秒。", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));

            Thread.Sleep();//假设这是个访问FQ网站的方法

            Console.WriteLine(string.Format("当前时间：{0}，主线程方法休眠 2 秒完成。即将等待 Task.Run 方法执行结束", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));

            task.Wait();

            Console.WriteLine(string.Format("当前时间：{0}，主线程方法整个方法执行完毕！！", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));

        }

    }

        public static void Run()

        {

            var url = "http://www.cnblogs.com?id=";

            var list_task = new List<Task<string>>();

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

            {

                var temp_url = url + i;

                var task = Task.Run(async () =>

                {

                    Console.WriteLine("temp_url=" + temp_url);

                    var client = new System.Net.Http.HttpClient();

                    var html = await client.GetStringAsync(temp_url);

                    Console.WriteLine("temp_url=" + temp_url + " is ok");

                    return html;

                });

                list_task.Add(task);

            }

            Task.WaitAll(list_task.ToArray());

            foreach (var item in list_task)

            {

                Console.WriteLine(item.Result);

            }

        }