using System;

using System.Collections.Generic;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Sleep이 안되는 Task는 무엇일까요?");

        Console.WriteLine("Run 메소드 를 보고 고르세요. (힌트 : 답은 여러개)");

        Console.ReadLine();

        Console.WriteLine("> Sleep이 안된 Task");

        Run();

        Thread.Sleep(500);

        Console.WriteLine("> Sleep이 정상적으로 된 Task");

        Thread.Sleep(1500);

        Console.WriteLine();

        Console.WriteLine("추가 질문) task에서 결과 값을 return시");

        Console.WriteLine("의도치 않은 결과 값을 가진 task는 무엇일까요?");

        Console.ReadLine();

        for (int idx = 0; idx < list.Count; idx++)

        {

            Console.WriteLine("{0} : {1}", "Task"+ (idx + 1), list[idx]);

        }

        Console.ReadLine();

    }

    private static List<object> list = new List<object>();

​

        static async void Run()

        {

            var task1 = Task.Factory.StartNew(() =>

            {

                Thread.Sleep(1000);

                Console.WriteLine("task1");

                return "task1";

            });

            var task2 = Task.Factory.StartNew(() =>

            {

                Task.Delay(1000);

                Console.WriteLine("task2");

                return "task2";

            });

            var task3 = Task.Factory.StartNew(async () =>

            {

                await Task.Delay(1000);

                Console.WriteLine("task3");

                return "task3";

            }).Unwrap();

            var task4 = await Task.Factory.StartNew(async () =>

            {

                await Task.Delay(1000);

                Console.WriteLine("task4");

                return "task4";

            });

            var task5 = Task.Factory.StartNew(async () =>

            {

                await Task.Delay(1000);

                Console.WriteLine("task5");

                return "task5";

            });

​

            var task6 = Task.Run(() =>

            {

                Thread.Sleep(1000);

                Console.WriteLine("task6");

                return "task6";

            });

            var task7 = Task.Run(() =>

            {

                Task.Delay(1000);

                Console.WriteLine("task7");

                return "task7";

            });

            var task8 = Task.Run(async () =>

            {

                await Task.Delay(1000);

                Console.WriteLine("task8");

                return "task8";

            });

​

            list.Add(task1);

            list.Add(task2);

            list.Add(task3);

            list.Add(task4);

            list.Add(task5);

            list.Add(task6);

            list.Add(task7);

            list.Add(task8);

        }

}