关于async与await的一点测试

Winform

       private async  Task DoAsync()
        {
            Console.WriteLine("DoAsync_Befor:" + Thread.CurrentThread.ManagedThreadId);
            for (int i = 0; i < 10; i++)
            {
                await Task.Run(() =>
                {
                    //Thread.Sleep(100);
                    Console.WriteLine("in:" + Thread.CurrentThread.ManagedThreadId);

                });
                Console.WriteLine("DoAsync_After:" + Thread.CurrentThread.ManagedThreadId);
            }
        }

        private  void button2_Click(object sender, EventArgs e)
        {
            Console.WriteLine("button2_Click_befor:" + Thread.CurrentThread.ManagedThreadId);
             DoAsync();
            Console.WriteLine("button2_Click_after:" + Thread.CurrentThread.ManagedThreadId);
            //Console.Read();

        }

Console

        static   void  Main(string[] args)
        {
            Console.WriteLine("Main_befor:" + Thread.CurrentThread.ManagedThreadId);
             DoAsync();
            Console.WriteLine("Main_after:" + Thread.CurrentThread.ManagedThreadId);
            Console.Read();
        }
        private static async Task DoAsync()
        {
            Console.WriteLine("DoAsync_Befor:" + Thread.CurrentThread.ManagedThreadId);
            for (int i = 0; i < 10; i++)
            {
                await Task.Run(() =>
                {
                    Thread.Sleep(100);
                    Console.WriteLine("in:" + Thread.CurrentThread.ManagedThreadId);

                });
                Console.WriteLine("DoAsync_After:" + Thread.CurrentThread.ManagedThreadId);
            }
        }

Winform 的DoAsync_After 始终是1，即 UI线程

而Console输出有多个情况，即Task.Run(...)中使用的线程，

所以在Winform中async与await是做特定处理的