public Philosophes(int numero, EcranDinerPhilosophes fen)
 {
     this.data    = numero;
     this.fenetre = fen;
 }
        private void MF_Philo_Click(object sender, EventArgs e)
        {
            EcranDinerPhilosophes f = new EcranDinerPhilosophes();

            f.ShowDialog();
        }