Asynchronous Invocation Of Delegates : Asynchronous « Thread « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Thread
3. Asynchronous

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;

    public delegate int MyDelegate();

    public class ClassWithDelegate
    {
        public MyDelegate theDelegate;
        public void Run()
        {
            for (; ; )
            {
                if (theDelegate != null)
                {
                    foreach (MyDelegate del in theDelegate.GetInvocationList())
                    {
                        del.BeginInvoke(new AsyncCallback(ResultsReturned), del);
                    } 
                } 
            } 
        } 
        private void ResultsReturned(IAsyncResult iar)
        {
            MyDelegate del = (MyDelegate)iar.AsyncState;
            int result = del.EndInvoke(iar);
            Console.WriteLine("Delegate returned result: {0}", result);
        }
    }
    public class MyHandler
    {
        private int myCounter = 0;
        public void Register(ClassWithDelegate theClassWithDelegate)
        {
            theClassWithDelegate.theDelegate += new MyDelegate(DisplayCounter);
        }
        public int DisplayCounter()
        {
            Thread.Sleep(10000);
            Console.WriteLine("Done with work in DisplayCounter...");
            return ++myCounter;
        }
    }
    public class Test
    {
        public static void Main()
        {
            ClassWithDelegate theClassWithDelegate = new ClassWithDelegate();
            MyHandler fs = new MyHandler();
            fs.Register(theClassWithDelegate);
            theClassWithDelegate.Run();
        }
    }