Retrieving Even-Numbered Events : delegate event « delegate « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. delegate
3. delegate event

using System;
   
public delegate void EvenNumberHandler(int Number);
   
class Counter
{
    public event EvenNumberHandler OnEvenNumber;
   
    public Counter()
    {
        OnEvenNumber = null;
    }
   
    public void CountTo100()
    {
        int CurrentNumber;
   
        for(CurrentNumber = 0; CurrentNumber <= 100; CurrentNumber++)
        {
            if(CurrentNumber % 2 == 0)
            {
                if(OnEvenNumber != null)
                {
                    OnEvenNumber(CurrentNumber);
                }
            }
        }
    }
}
   
class EvenNumberHandlerClass
{
    public void EvenNumberFound(int EvenNumber)
    {
        Console.WriteLine(EvenNumber);
    }
}
   
class MainClass
{
    public static void Main()
    {
        Counter MyCounter = new Counter();
        EvenNumberHandlerClass MyEvenNumberHandlerClass = new EvenNumberHandlerClass();
        MyCounter.OnEvenNumber += new EvenNumberHandler(MyEvenNumberHandlerClass.EvenNumberFound);
        MyCounter.CountTo100();
    }
}