I am accessing a REST webservice from a VB app. I create a HttpWebResponse object and call GetRequestStream on it just fine, but when I call GetResponse I get a 401 exception.

Here is my code (modified for posting):

```
Dim webRequest = DirectCast(WebRequest.Create(endpoint), HttpWebRequest)
webRequest.Method = "POST"
webRequest.ContentLength = contentLength
webRequest.ContentType = "application/x-www-form-urlencoded"

request.Credentials = New NetworkCredential(Username, Password)

' Works fine
Using stream As Stream = webRequest.GetRequestStream()
    stream.Write(data, 0, data.Length)
End Using

' Barfs
Dim response As HttpWebResponse = DirectCast(webRequest.GetResponse(), HttpWebResponse)

```

I get a 401 exception as soon as I call "webRequest.GetResponse()". There is a "WWW-Authenticate" header in the response, with the appropriate realm. I have tried setting "webRequest.PreAuthenticate = True", as well as manually setting the header with "webRequest.Headers.Add(HttpRequestHeader.Authorization, \_authheader)"

I can not seem to monitor these requests with Fiddler / Wireshark etc. because this is SSL traffic, I am sure there is a way to monitor it, I just have not found it yet.

Thanks in advance,

--Connor