ManualWorkflowSchedulerService

By default, workflow runtime use DefaultWorkflowSchedulerService as scheduler, what this means is that the workflow instance run in a separate thread. So if you want to wait for the workflow to finished, you need AutoResetEvent object to synchronize the thread. But in asp.net you make want to use a single thread. Here is an article Using Workflows with ASP.NET.

//you need to add this to to runtime initialization ManualWorkflowSchedulerService manualService = new ManualWorkflowSchedulerService(); _workflowRuntime.AddService(manualService); //you need to perform additional steps //to run the workflow. WorkflowInstance instance = _workflowRuntime.CreateWorkflow( typeof(SimpleCalculatorWorkflow.Workflow1), wfArguments); instance.Start(); ManualWorkflowSchedulerService manualScheduler = _workflowRuntime.GetService(typeof(ManualWorkflowSchedulerService)) as ManualWorkflowSchedulerService; manualScheduler.RunWorkflow(instance.InstanceId);