C# async、await、Task 探讨

test02.ProntOut();
///*第五题*/
static class test02
{
    public static async void ProntOut()
    {
        Console.WriteLine("80行：" + Thread.CurrentThread.ManagedThreadId.ToString());
        Func<Task> doit = async () =>
        {
            Console.WriteLine("83行：" + Thread.CurrentThread.ManagedThreadId.ToString());
            Console.WriteLine(111);
            var task = Task.Run(async () =>
            {
                Console.WriteLine("87行：" + Thread.CurrentThread.ManagedThreadId.ToString());
                //await Task.Delay(3000);
                Thread.Sleep(3000);
                Console.WriteLine(222);
            });
            await task;
            Console.WriteLine(333);
            Console.WriteLine("94行：" + Thread.CurrentThread.ManagedThreadId.ToString());
        };
        Console.WriteLine("96行：" + Thread.CurrentThread.ManagedThreadId.ToString());
        await doit();
        Console.WriteLine("98行：" + Thread.CurrentThread.ManagedThreadId.ToString());
        Thread.Sleep(5000);
    }
}