Task示例，多线程

 class Program
    {
        static void Main(string[] args)
        {
            Run();

        }

        public static async void Run()
        {
            var tasks = StartMultiWorkerTasks();
            if (tasks.Length > 0)
            {
                await Task.WhenAll(tasks).ContinueWith(t =>
                {
                    Console.WriteLine("done ......");
                });
            }
            Task.WaitAll(tasks);
        }

        /// <summary>
        /// Start multi tasks
        /// </summary>
        /// <param name="request"></param>
        /// <param name="coupleSyncResult"></param>
        /// <returns></returns>
        public static Task[] StartMultiWorkerTasks()
        {
            Task[] tasks = new Task[3];
            tasks[0] = Task.Run(() => Console.WriteLine("do some thing 1...................."));
            tasks[1] = Task.Run(() => Console.WriteLine("do some thing 2...................."));
            tasks[2] = Task.Run(() => Console.WriteLine("do some thing 3...................."));
            return tasks;
        }
    }