WCF: Retrieving MethodInfo from OperationContext

Question

Is there an elegant way to get the method that will be executed on a service instance from MessageInspector/AuthorizationPolicy/some other extension point? I could use

Answer 1

Based on @Aaronaught and @TimDog 's answers, and this SO question I came up with a solution that should work for both REST and SOAP.

///
Returns the Method info for the method (OperationContract) that is called in this WCF request.
System.Reflection.MethodInfo GetActionMethodInfo(System.ServiceModel.OperationContext operationContext ){
    string bindingName = operationContext.EndpointDispatcher.ChannelDispatcher.BindingName;
    string methodName;
    if(bindingName.Contains("WebHttpBinding")){
            //REST request
            methodName = (string) operationContext.IncomingMessageProperties["HttpOperationName"];
    }else{
            //SOAP request
            string action = operationContext.IncomingMessageHeaders.Action;
            methodName = operationContext.EndpointDispatcher.DispatchRuntime.Operations.FirstOrDefault(o =>o.Action == action).Name;
    }
    // Insert your own error-handling here if (operation == null)
    Type hostType = operationContext.Host.Description.ServiceType;
    return hostType.GetMethod(methodName);
}