using System;

public class Program

{

    public static void Main()

    {

        var c = new EnrChange { Change = "hola"};

        var b = new Bob { Animal = "puma"};

        var h = new Handy();

        var cx = h.Handle(c);

        var bx = h.Handle(b);

        Console.WriteLine("Hello World {0} {1}", cx, bx);

    }

}

public class EnrChange 

    {

    public string Change { get; set;} 

    } 

public class Bob 

    {

    public string Animal { get; set;} 

    } 

public class Handy

    {

    public int Handle<T>(T message) 

        {

        return 0;

        } 

    public int Handle(EnrChange message) 

        {

        return 1;

        } 

    }