c# - HttpClient retrieve all headers

Question

Currently, I am working on API wrapper. If I send a bad Consumer Key, the server will return Status as 403 Forbidden in the header. It will also pass custom headers. How do I actually retrieve these custom headers?

This is the response receive from the server.

Cache-Control: private
Date: Wed,  01 May 2013 14:36:17 GMT
P3P: policyref="/w3c/p3p.xml",  CP="ALL CURa ADMa DEVa OUR IND UNI COM NAV INT STA PRE"
Server: Apache/2.2.23 (Amazon)
Status: 403 Forbidden
X-Error: Invalid consumer key.
X-Error-Code: 152
X-Powered-By: PHP/5.3.20
Connection: keep-alive

I need to retrieve the X-Error and X-Error-Code. Currently, I am using HttpClient class to process the request. If I watch the headers respond under Quick Watch in VS Studio 2012, I could find it like this

((System.Net.Http.Headers.HttpHeaders)(response.Headers)).headerStore["X-Error-Code"].ParsedValue

Is there any other way to do this?

Edit: headerStore is not accessible thru code as this is private field. I only get access to it through the Quick Watch window.

This is my snippet for the request:

var response = await _httpClient.PostAsync("/v3/oauth/request", content);

Answer 1

Well, HttpResponseMessage.Headers returns an HttpResponseHeaders reference, so you should be able to use GetValues()

string error = response.Headers.GetValues("X-Error").FirstOrDefault();
string errorCode = response.Headers.GetValues("X-Error-Code").FirstOrDefault();