C# Can'；t使用httpwebrequest发布到https

我正试图利用我们网站某个部分已经完成的功能，登录该网站，然后像使用浏览器一样与之交互。也许有一个更好的方法，所以这是值得欢迎的。不过，我不得不使用C#

此表单在其他空白网页中成功登录到网站（当然，我将其虚拟化）：

我也试过：

        string URI = "https://myaccount.boom.us/Admin/Account/Login";
            string postData = "EmailAddress=theprocess@oursite.com";
            postData += "&Password=avalidpassword";

        using (WebClient wc = new WebClient())
        {
            wc.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
            string HtmlResult = wc.UploadString(URI, postData);
        }

它也只是重新加载相同的登录页面

---

我做错了什么？

最好的调试方法是使用Fiddler之类的工具，通过浏览器登录您的站点。检查发送到服务器的请求，并将其与您在代码中发送的请求进行比较，看看缺少什么。我尝试了fiddler，但它没有提供任何有用的信息。或者也许我不够熟练，无法从fiddler那里提取有用的信息。

             var request = (HttpWebRequest)WebRequest.Create("https://oursite.com/Admin/Account/Login");

            string postData = "EmailAddress=theprocess@oursite.com";
            postData += "&Password=avalidpassword";
            byte[] data = Encoding.ASCII.GetBytes(postData);


            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = data.Length;

            using (var stream = request.GetRequestStream())
            {
                stream.Write(data, 0, data.Length);
            }

            var response = (HttpWebResponse)request.GetResponse();


            var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();

        string URI = "https://myaccount.boom.us/Admin/Account/Login";
            string postData = "EmailAddress=theprocess@oursite.com";
            postData += "&Password=avalidpassword";

        using (WebClient wc = new WebClient())
        {
            wc.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
            string HtmlResult = wc.UploadString(URI, postData);
        }