C# Delegates - Example...

First u have a Subscriber Class

//Subscriber.cs

using System;

public class Subscriber{

public void GreaterThanHundred(Numbers source){

Console.WriteLine("*****GreaterThanHundred "+source.Num);

}

public void LessThanZero(Numbers source){

Console.WriteLine("*****LessThanZero "+source.Num);

}

public void ValueUpdated(Numbers source){

Console.WriteLine("*****ValueUpdated "+source.Num);

}

public void LogChange(Numbers source){

Console.WriteLine("*****LogChange "+source.Num);

}

}

//Numbers.cs

public delegate void Numberdel(Numbers source);

public class Numbers{

//attributes

private int num=70;

//events

public Numberdel ValueChanged;

public Numberdel LargeNumber;

public Numberdel NegativeNumber;

//properties

public int Num{

get{

 return num;

}

set{

if (0==value)

return;

num+=value;

ValueChanged(this);//raise an event

if(num>100)

LargeNumber(this);//raise an event

if(num<0)

NegativeNumber(this);//raise an event

}

}

}

Atlast u hav Mediator Class

//Mediator.cs

public class Mediator{

  public static void Main(System.String[] args){

Numbers obj= new Numbers();

Subscriber s=new Subscriber();

obj.ValueChanged=new Numberdel(s.ValueUpdated);

obj.ValueChanged+=new Numberdel( s.LogChange);

obj.LargeNumber=new Numberdel(s.GreaterThanHundred);

obj.NegativeNumber=new Numberdel(s.LessThanZero);

obj.Num=int.Parse(args[0]);

  }

  

 }