Can we generate asynchronous client proxy for a non-asynchronous WCF service method?

this failed miserably when calling two services at the same time with the following error: "This OperationContextScope is being disposed on a different thread than it was created."

Do not use the asynchronous “await” pattern within a OperationContextScope block. When the continuation occurs, it may run on a different thread and OperationContextScope is thread specific. If you need to call “await” for an async call, use it outside of the OperationContextScope block.