private void OKButton_Click(object sender, RoutedEventArgs e)
 {
     Galatee.Silverlight.ServiceReport.ReportServiceClient service = new Galatee.Silverlight.ServiceReport.ReportServiceClient(Utility.ProtocoleFacturation(), Utility.EndPoint("Report"));
     service.ReturneFichierPersonnelCompleted += (s, args) =>
     {
         if (args != null && args.Cancelled)
         {
             return;
         }
         Message.ShowInformation("Traitement ok", "Fichier personnel");
     };
     service.ReturneFichierPersonnelAsync(Shared.ClasseMEthodeGenerique.FormatPeriodeAAAAMM(this.txt_Periode.Text), SessionObject.CheminImpression);
     service.CloseAsync();
 }