title: WF: Determining if workflow completed
body: <p>How do I determine from the host if a workflow instance has compled or not besides subscribing to the WorkfloRuntime's WorkflowCompleted event? Is there any flag or state I can check for a given WorflowInstance to determine if it has completed?</p>
  
  <p><strong>@Edit:</strong> The question is about sequential workflows.</p>