DRAG DROP
Exhibit:
<ServiceContract>
Public Interface IMessageProcessor
<OperationContract>
Sub PassGuideProcess()
End Interface
Public Class MessageProcessor
Implements IMessageProcessor
Public Sub ProcessMessage() Implements IMessageProcessor ProcessMessage
PassGuideSubmit()
End Sub
End Class
There is a WCF (Windows Communication Foundation) service PassGuideService.
It is defined in the exhibit.
PassGuideSubmit uses another service not defined above.
There is performance problem with the PassGuideProcess method when it is run in heavy load.
Processing of multiple messages must be supported.
Additionaly you must make sure that new messages is only processed when PassGuideProcess is
not waiting for request and there is no waiting for PassGuideSubmit processes to finish.
How can this be ensured? 
Answer: 
Explanation: