Operators and Expressions:Type operators:Is

   


/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson

Publisher: Apress  L.P.
ISBN: 1-893115-62-3
*/

// 14 - Operators and ExpressionsType operatorsIs
// copyright 2000 Eric Gunnerson
using System;
interface IAnnoy
{
    void PokeSister(string name);
}
class Brother: IAnnoy
{
    public void PokeSister(string name)
    {
        Console.WriteLine("Poking {0}", name);
    }
}
class BabyBrother
{
}

public class TypeoperatorsIs
{
    public static void AnnoyHer(string sister, params object[] annoyers)
    {
        foreach (object o in annoyers)
        {
            if (o is IAnnoy)
            {
                IAnnoy annoyer = (IAnnoy) o;
                annoyer.PokeSister(sister);
            }
        }
    }
    public static void Main()
    {
        TestoperatorsIs.AnnoyHer("Jane", new Brother(), new BabyBrother());
    }
}