using System;

using System.Threading;

using System.Collections.Generic;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        var tm = new TaskManager();

        await tm.Run();

    }

}

​

public class TaskManager{

    public async Task Run(){

        List<Task> l = new List<Task>();

        for(var i = 0; i < 10; i++){

            var capturedI = i; // Capture the current value of i

            l.Add(new Task(async () => { await new MyTask().Log(capturedI);}));

            Console.WriteLine("Added task {0}", i);

        }

        try {

            Console.WriteLine("Waiting task completion");

             // Start all tasks concurrently

            foreach (var task in l)

            {

                task.Start();

            }

            await Task.WhenAll(l);

            Console.WriteLine("Complete!");

        }

        catch(Exception ex){

            Console.WriteLine(ex);

        }

    }

}

​

​

public class MyTask 

{

    public async Task Log(int i){

        Console.WriteLine("Test " + i + " completed!");

        await Task.Delay(100);

    }

}

​

​