gistfile1.cs

[RLPFieldApiConfig]
public class RLPFieldController : ApiController {
    public class RLPFieldApiConfigAttribute : Attribute, IControllerConfiguration {
        public void Initialize(HttpControllerSettings controllerSettings, HttpControllerDescriptor controllerDescriptor) {
            controllerSettings.Formatters.JsonFormatter.SerializerSettings = new JsonSerializerSettings {TypeNameHandling = TypeNameHandling.Objects};
        }
    }
.
.
.
.
}