c# - Wcf CommunicationException MVC -


when call wcf services on mvc project, throws below exception, how can solve issue?

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exception : operation not supported in wcf client because uses type helper.methodresponse

but there no exception inserting data. mean createuserwcf working.

exception : exception of type 'system.servicemodel.communicationexception' occurred in mscorlib.dll not handled in user code

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