public static void Transact()
        {
            MessageQueue file = new MessageQueue(@".\private$\resaVoyage");

            file.Formatter = new XmlMessageFormatter(new Type[] { typeof(Voyage) });

            Voyage voyage = (Voyage)file.Peek().Body;

            using (TransactionScope transaction = new TransactionScope())
            {
                Vol.AddReservationVol(voyage.Vol.IdVol, 1, voyage.prenom, voyage.nom);
                Hotel.InsertReservationHotel(voyage.Hotel.IdHotel, 1, voyage.prenom, voyage.nom);

                transaction.Complete();

                file.Receive();
            }

            file.Close();
        }