多項選擇題

You are developing a WCF service. The service includes an operation names GetProduct. You need to ensure that GetProduct will accept a POST request and will indicate that the returned data is XML.  
Which two actions should you perform?()

A.Add the WebGet attribute to the service contract.
B.Set WebOperationContext.Current.OutgoingRequest.ContentType to "text/xml" in the GetProduct method.
C.Add the WebInvoke attribute to the service contract.
D.Set WebOperationContext.Current.OutgoingResponse.ContentType to "text/xml" in the GetProduct method.

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