using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

​

public class Table

{

    public event TableOpenEvent tableopen;

    public void TableEventNotification()

    {

        if(tableopen != null)

        {

            tableopen(this, new TableEvent());

        }   

    }

}

​

public delegate void TableOpenEvent(Object sender, TableEvent t);

​

public class TableEvent : EventArgs

{

    private string message = "Table is open!";

    public void TableOpen()

    {

        Console.WriteLine(message);

    }   

}