larsw_quiz_20110321.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

//
// Quiz: how can you get this to compile / run / output "Hello World", by only adding three attributes?
//
// Lars Wilhelmsen / @larsw
//
namespace InterfaceInstances
{
    public interface IFoo 
    {
        void SayHello();
    }

    public class Foo : IFoo 
    {
        public void SayHello()
        {
            Console.WriteLine("Hello World");
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var foo = new IFoo();
            foo.SayHello();
        }

    }
}