//ZEG 28/09/2017
        private void SupprimerPieceJointe(ObjDOCUMENTSCANNE piece)
        {
            Galatee.Silverlight.ServiceAccueil.AcceuilServiceClient service = new Galatee.Silverlight.ServiceAccueil.AcceuilServiceClient(Utility.ProtocoleFacturation(), Utility.EndPoint("Accueil"));
            service.SupprimerPieceJointeCompleted += (s, args) =>
            {
                if ((args != null && args.Cancelled) || (args.Error != null))
                {
                    return;
                }

                if (args.Result == true)
                {
                    Message.Show("Suppression réussie...", "Pièce jointe");
                }
            };
            service.SupprimerPieceJointeAsync(piece);
            service.CloseAsync();
        }