using System;

using System.Threading;

using System.Threading.Tasks;

​

public class AATest {

        public async Task Together()

        {

            // await Some(true); await Some(false);

            await Task.WhenAll(Some(true), Some(false));

        }

​

        private async Task Some(bool a)

        {

            for (var i = 1; i < 10; i++) {

                // Thread.Sleep(new Random().Next(100));

                await Task.Run(() => Thread.Sleep(new Random().Next(100)));

                Console.WriteLine(a);

            }

        }

        public async Task V() {

            await Task.Run(() => Thread.Sleep(1000));

            Console.WriteLine("V done");

        }

}

​

public class Program

{

    public static void Main()

    {

        var a = new AATest();

        // a.Together().Wait();

        a.V().

            GetAwaiter().GetResult()

            ;

        Console.WriteLine("V");

    }

}