using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Personne p = new Personne("Toto", "titi");

        p.Afficher();

    }

}

​

public class Personne

{

    public string Nom { get; set; }

    public string Prenom { get; set; }

    public Personne(string nom, string prenom)

    {

        this.Nom = nom;

        this.Prenom = prenom;

    }

    public void Afficher()

    {

        Console.WriteLine("{0} {1}", this.Nom, this.Prenom);

    }

}