Pass response body from IDispatchMessageInspector to Application_EndRequest

I want to log the request parameters and response body that traffics thru my WCF REST service . I can access full response in IDispatchMessageInspector. And I can access request headers and other items that I store in Context.Items during the operations in Application_EndRequest.

During my debugging, I see the operations goes thru IDispatchMessageInspector and then thru Application_EndRequest. My idea is to store the response somewhere in IDispatchMessageInspector and then in Application_EndRequest, I'll retrieve the response and log it together with other request parameters.

So my question is: Where should I store the response so it's accessible in Application_EndRequest?

I'm currently trying to do something similar. I am logging an incoming request, storing it in the database and would then like to pass the log ID to my endpoint for use later. In your AfterReceiveRequest call, simply add whatever you need to the IncomingMessageProperties attribute of the current operationcontext:

Edit: Fixed the code below

public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
    {
        MessageBuffer buffer = request.CreateBufferedCopy(Int32.MaxValue);
        request = buffer.CreateMessage();
        int LogRequestID = Logging.LogIncomingRequest(buffer.CreateMessage());

        OperationContext.Current.IncomingMessageProperties.Add("LogRequestID", LogRequestID);

        return null;
    }

I can then read the LogRequestID in my endpoint with the following code:

OperationContext.Current.IncomingMessageProperties["LogRequestID"]

You can also pass a more complex if you need to. Hope that helps.