VB.NET从POST更新Cookie

过去几天我一直在研究这个问题，终于取得了一些进展。。今天，我设法强制cookie通过请求，服务器最终验证了请求，但是我无法更新cookie并将验证后的cookie传输到接下来的几页

    'post form  data to page
    strUrl = "https://e926.net/user/authenticate"
    webRequest2 = HttpWebRequest.Create(strUrl)
    webRequest2.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.2.3) Gecko/20100401 Firefox/4.0 (.NET CLR 3.5.30729)"
    webRequest2.AllowAutoRedirect = True
    webRequest2.Method = WebRequestMethods.Http.Post
    webRequest2.ContentType = "application/x-www-form-urlencoded"
    webRequest2.CookieContainer = cookies
    webRequest2.ContentLength = postData.Length

    requestWriter = New StreamWriter(webRequest2.GetRequestStream)
    requestWriter.Write(postData)
    requestWriter.Close()


    Dim response2 As HttpWebResponse = CType(webRequest2.GetResponse(), HttpWebResponse)
    Dim strCookies2 As String = response2.Headers("Set-Cookie")
    MsgBox(strCookies2)
    strCookies2 = System.Text.RegularExpressions.Regex.Split(strCookies2, "((e926=.*))")(1)
    strCookies2 = strCookies2.Split(";")(0)
    strCookies2 = strCookies2.Replace("e926=", "")

    cookie.Name = "e926"
    cookie.Value = strCookies2
    cookie.Domain = ".e926.net"
    cookie.HttpOnly = True
    cookie.Path = "/"
    cookies.Add(cookie)


    'recieve authenticated cookie
    webRequest2.GetResponse().Close()

这是实际提交登录详细信息并处理实际登录请求的页面代码，我可以在Fiddler中看到“用户”cookie已发送，“e926/auth”cookie已更新，但我无法从标题或我尝试过的任何其他方法获取更新的cookie

该页面是PHP，不允许“GET”请求，当然这些请求也不会有任何帮助，因为Cookie似乎从未正确传输，并且必须根据请求更新Cookie

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因此，我的问题是，如何从VB.NET中的页面获取更新的cookie？

我所要做的就是将“自动重定向”从“true”更改为false，并强制从“auth”页面而不是“home”页面收集cookie