#region Async、Await
        static void Async()
        {
            Async1();
            Thread.Sleep(1200);
            Console.WriteLine("Main Stop,Thread Id:" + Thread.CurrentThread.ManagedThreadId);
        }
        static async void Async1()
        {
            await Task.Run(() =>
            {
                Thread.Sleep(
 
1000);
                Console.WriteLine("Async Stop,Thread Id:" + Thread.CurrentThread.ManagedThreadId);
            });
        }
        #endregion    

C# Async Await