Thread.Sleep为什么不在示例中阻塞线程

Question

Thread.Sleep() is putting main thread on hold for certain number of milliseconds. I would expect Thread.Sleep() to block main thread even if it's called from different thread ( Task.Run() creates new thread in fact), why when it comes to PleaseWait() my loop which is on main thread is still executing since Thread.Sleep was called? It should be paused to me. Or is it because in fact that Thread.Sleep() called on different thread by Task.Run is now not exactly Thread.Sleep for main thread now but it is referring to the new thread created in Task.Run . Means it's not Sleep for main thread but for thread created on Task.Run side ? Hope it's clear.

class Program
    {
        static void Main(string[] args)
        {
            Task.Run(() => PleaseWait());

            var n = 0;
            while (n < 10000)
            {
                Console.WriteLine(n);
                n++;
            }

            Console.ReadLine();
        }


        public static void PleaseWait()
        {
            Thread.Sleep(10000);
            Console.WriteLine("After sleep");
        }
    }

Answer 1

I would expect Thread.Sleep() to block main thread even if it's called from different thread

Lets visit the documentation

Thread.Sleep Method

Suspends the current thread for the specified amount of time.

Meaning it blocks the thread it is called from, Case closed