Cannot have two operations in the same contract with the same name (Async & Non)

Question

I get the following exception (Cannot have two operations in the same contract with the same name, methods ExecuteAsync and Execute) when the following service is activated.

Answer 1

The above is not valid because WCF itself makes two methods for each OperationContract in your case Execute() one synchronous and second asynchronous, which can be called on client side by writing ServiceClientObj.ExexuteAsync(request), so you don't need to add async method explicitly in the IMyService.The Framework is itself responsible for generating async method of each Operation