private bool Wkf_Portefeuille(string sId_portefeuille)
        {
            bool bRet = false;
            string sWorkflow = ConfigurationManager.AppSettings.Get("WF_PORTEFEUILLE_CREATE"); // Workflow to invoke
            string ruleName = "wkf Rule";

            Dictionary<string, string> parameters = new Dictionary<string, string> // workflow parameters 
            {
                { "CODE_PORTEFEUILLE", sId_portefeuille }
            };
            try
            {
                Initiator initiateur = new Initiator
                {
                    Name = "workflow"
                };
                string guid = Guid.NewGuid().ToString();
                Guid Ng = new Guid(guid);
                string sId_wf = DateTime.Now.ToString("yyyyMMddHH");
                int.TryParse(sId_wf, out int nId);                               
                string sEntry_name = @"\webservice " + DateTime.Now.ToString("yyyyMMddHHmmssfff");

                StartingEntry entry = new StartingEntry()
                {
                    Id = nId,
                    FullPath = sEntry_name,
                    EntryGuid = Ng,
                    Repository = LF_repository,
                    Server = LF_server
                };

                WorkflowApplication app = new WorkflowApplication
                {
                    Registration = new WorkflowServerRegistration(LF_server), 
                    ApplicationName = "appel_webservice",
                    ApplicationType = WorkflowApplicationType.Client
                };


                using (WorkflowConnection connection = app.Open())
                {
                    WorkflowCreationOptions options = new WorkflowCreationOptions
                    {
                        WorkflowInstanceId = Ng
                    };
                    PublishedWorkflow workflow = connection.Database.GetPublishedWorkflow(sWorkflow);
                    workflow.StartWorkflowDirectly(ruleName, entry, initiateur, options, parameters);
                    nBOUCLE = 0;
                    bRet = Wf_process(0, sWorkflow, Ng, sEntry_name, sId_wf, nId, app);
                }
            }
            catch (Exception ex)
            {
                Write_log(ex.Message);
                Write_log(ex.StackTrace);
            }

            return bRet;
        }