Can a WCF OperationContract method's WebGet attribute have multiple ResponseFormat types?

Question

I have a ServiceContract describing a method used in a WCF service. The method has a WebGet attribute which defines a UriTemplate and ResponseFormat.

I want to reuse a

Answer 1

If I remember correctly, below method worked for me:

Contract for json service:

[ServiceContract]
public interface IServiceJson {
  [OperationContract()]
  [WebGet(UriTemplate = "Operation/?param={param}",
                         ResponseFormat = WebMessageFormat.Json)]
  ReturnType Operation(string param);
}

Contact for xml service:

[ServiceContract]
public interface IServiceXml {
  [OperationContract(Name = "OperationX")]
  [WebGet(UriTemplate = "Operation/?param={param}",
                         ResponseFormat = WebMessageFormat.Xml)]
  ReturnType Operation(string param);
}

Implementation for both:

public class ServiceImplementation : IServiceJson, IServiceXml {
  ReturnType Operation(string param) {
    // Implementation
  }
}

And web.config configuration (note endpoints for json and xml responses):

Now you can call your service like this: json response: http://yourServer/json/Operation/?param=value xml response: http://yourServer/xml/Operation/?param=value

(Sorry if there are any bugs in code above, I didn't run it for verification).