using System;

​

public class OddNumberEventArgs : EventArgs

{

    public int i;

    public OddNumberEventArgs(int _i)

    {

        i = _i;

    }

    public int Data { get { return i; }}

}

public class Program

{

    private event EventHandler OddNumberEvent;

    private void printOddNumber(Object sender, EventArgs eventArguments)

    {

        Console.WriteLine(((OddNumberEventArgs)eventArguments).Data);

    }

    private void printSquareOddNumber(Object sender, EventArgs eventArguments)

    {

        Console.WriteLine("------------");

        Console.WriteLine(sender.GetType());

        Console.WriteLine( ((OddNumberEventArgs)eventArguments).Data * ((OddNumberEventArgs)eventArguments).Data );

        Console.WriteLine("------------");

    }

    public void Main()

    {

        OddNumberEvent += printOddNumber;

        OddNumberEvent += printSquareOddNumber;

        for(int i=0; i<100; ++i)

        {

            if(i%2 == 1)

            {

                this.OddNumberEvent(this, new OddNumberEventArgs(i));

            }

        }

        Console.WriteLine("Hello World");

    }

}