Получить метод на Httpwebrequest Vb.net

Question

Я хочу загрузить веб-страницу как txt в RichtextBox, но каждый раз, когда у меня возникает проблема.

Итак, http Capture:

GET /wp-json/binlist/v1/441442/?_wpnonce=335f68c9e2 HTTP/1.1
Host: binlist.org:443
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: _ga=GA1.2.1639241798.1540059335
User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML,         like Gecko) Chrome/65.0.0.1617 Safari/537.36

HTTP/1.1 200
access-control-allow-headers: Authorization, Content-Type
access-control-expose-headers: X-WP-Total, X-WP-TotalPages
allow: GET
alt-svc: quic=":443"; ma=86400; v="43,39"
cache-control: max-age=0
content-encoding: gzip
content-length: 221
content-type: application/json; charset=UTF-8
date: Sat, 22 Jun 2019 10:02:14 GMT
expires: Sat, 22 Jun 2019 10:02:13 GMT
host-header: 192fc2e7e50945beb8231a492d6a8024
link: <https://binlist.org/wp-json></https:>; rel="https://api.w.org/"
server: nginx
set-cookie: wpSGCacheBypass=0; expires=Sat, 22-Jun-2019 09:02:13 GMT; Max-        Age=0; path=/
status: 200
 vary: Accept-Encoding
x-cache-enabled: True
x-content-type-options: nosniff
x-proxy-cache: MISS
x-robots-tag: noindex
x-wp-nonce: 335f68c9e2 

проблема в части postresponse = DirectCast(postReq.GetResponse(), HttpWebResponse) я много раз пытался ее решить, но не могу Может кто-нибудь объяснить мне, что сестра не так?

Dim postData As String = "/wp-json/binlist/v1/441442/?_wpnonce=335f68c9e2"
    Dim tempCookies As New CookieContainer
    Dim encoding As New UTF8Encoding
    Dim byteData As Byte() = encoding.GetBytes(postData)
    Dim postReq As HttpWebRequest = DirectCast(WebRequest.Create("https://binlist.org/"), HttpWebRequest)
    postReq.Method = "GET"
    postReq.KeepAlive = True
    postReq.ContentType = "text/html; charset=UTF-8"
    postReq.UserAgent = "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.0.1617 Safari/537.36"
    postReq.ContentLength = byteData.Length
    Dim postreqstream As Stream = postReq.GetRequestStream()
    postreqstream.Write(byteData, 0, byteData.Length)
    postreqstream.Close()
    Dim postresponse As HttpWebResponse
    postresponse = DirectCast(postReq.GetResponse(), HttpWebResponse)
    tempCookies.Add(postresponse.Cookies)
    logincookie = tempCookies
    Dim postreqreader As New StreamReader(postresponse.GetResponseStream())
    Dim thepage As String = postreqreader.ReadToEnd
    RichTextBox1.Text = thepage