You are developing a Windows Communication Foundation (WCF) service that does not operate on a duplex channel. You find that operations do not start until all previous operations have finished. The…

You are developing a Windows Communication Foundation (WCF) service that does not operate on a duplex channel. You find that operations do not start until all previous operations have finished. The service hosting code contains the following lines. Dim service = New WarehouseService() Dim hose = New ServiceHost(service) You need to ensure that new operations do not wait for previous operations to finish. Which attribute should you use to decorate the service?