ASP.NET-MVC-Study/AdvancedC#Grammer/MySolution/MyConsoleApp/Work/AsyncAwaitWork.cs

namespace MyConsoleApp.Work
{
    public class AsyncAwaitWork
    {
        private static Task Test()
        {
            System.Console.WriteLine("Start Test");
            Task t = Task.Delay(3000);
            return t;
        }

        private static async void TestAsync()
        {
            System.Console.WriteLine("Start Test");
            Task t = Task.Delay(3000);
            await t; // 함수 내부에서는 동기, 함수 호출부에서는 비동기로 처리됨
            System.Console.WriteLine("End TestAsync");
        }

        private static async Task<int> TestAsync2()
        {
            System.Console.WriteLine("Start Test");
            Task t = Task.Delay(3000);
            await t; 
            System.Console.WriteLine("End TestAsync");

            return 1;
        }

        public async static void DoTest()
        {
            // Task t = Test();
            // t.Wait();

            //TestAsync();
            await TestAsync2(); // 메인 함수도 동기로 처리됨

            int res = await TestAsync2();

            System.Console.WriteLine("While start");
            while (true)
            {

            }
        }
    }
}