using System;

using System.Threading.Tasks;

using System.Threading;

using System.Collections.Generic;

using System.Diagnostics;

​

namespace AsyncTests

{

    class Program

    {

        public class ProgramState 

        {

            public int theValue;

        }

​

        public static ProgramState programState = new ProgramState();

        static async Task TaskThatSometimesReport(int randomSeed, IProgress<string> progress) 

        {

            var random = new Random(randomSeed);

            await Task.Yield();

            const int count = 3;

            for (int i = 0; i < count; ++i) 

            {

                int wait = random.Next(10, 400);

                Thread.Sleep(wait);

                progress.Report("step");

            }

            return;

        }

        static async Task Main(string[] args)

        {

            List<string> sharedList = new List<string>();

            const int taskCount = 3;

            var tasks = new List<Task>();

​

            var progress = new Progress<string>(text =>

            {

                const int count = 3;

                programState.theValue = 0;

                for (int i = 0; i < count; ++i)

                {

                    int y = 1;

                    for (int x = 0; x < 9000000; x++) {

                        y = y ^ x;

                    }

​

                    programState.theValue += 1;

                }

                Console.WriteLine($"{count} vs {programState.theValue}");

            });

​

            for (int i = 0; i < taskCount; ++i) 

            {

                var task = TaskThatSometimesReport(i * 3024240, progress);

                tasks.Add(task);

            }

​

            await Task.WhenAll(tasks);

​

        }

    }

}

​