using System;

using System.Collections.Generic;

using System.Threading.Tasks;

​

public class Stuff {

    public string Name { get; set; }    

}

​

public class SendMeStuff {

    public Func<List<Stuff>, Task> ReceivedHandler { get; set; }

​

    public async Task DoIt() {

        List<Stuff> stuff = new List<Stuff>();

        stuff.Add(new Stuff{ Name = "Oranges" });

        stuff.Add(new Stuff{ Name = "A Lamp" });

        stuff.Add(new Stuff{ Name = "Chocolate" });

        stuff.Add(new Stuff{ Name = "One million dollars!" });

        stuff.Add(new Stuff{ Name = "Tea" });

​

        await ReceivedHandler(stuff);

    }

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Create stuff maker ...");

        var stuffMaker = new SendMeStuff();

        stuffMaker.ReceivedHandler = async (d) => { await HandleStuff(d); };

​

        Console.WriteLine("Get stuff ...");

        stuffMaker.DoIt();

    }

    private static async Task HandleStuff(List<Stuff> stuff) {

        Console.WriteLine("The handler");

        //await Task.Delay(TimeSpan.FromMilliseconds(1));   // So cliche

        foreach(Stuff item in stuff) {

            Console.WriteLine(item.Name);

        }

    }

}