C＃web请求认证不起作用，试过多种方法都行不通

Question

我需要任何知道C＃的人的帮助！我需要创建一个简单的C＃脚本来创建Web请求，并且能够使用HTTP身份验证登录。我正在我的一个网站上测试我设置了密码锁的脚本（不要担心没有任何机密，只是密码被阻止用于测试目的）： www.alienauthoritythegame.com

用户名和密码：edward tester

我已经找到了几个关于如何执行此操作的解决方案（包括此处的StackOverflow），但它们都不起作用。我尝试的每个代码/方法都包含了我尝试的方法上面的注释。这些都不起作用。当我试图从网页上得到回复时，我每次都得到401。任何帮助表示赞赏。

http_username = "edward";
   http_password = "tester";
   http_authentication = 1;

   try
   {
       string url = "http://alienauthoritythegame.com";
       Uri myUri = new Uri(url);
       WebRequest request = HttpWebRequest.Create(myUri);
       HttpWebRequest myHttpWebRequest = (HttpWebRequest)request;
       request.PreAuthenticate = true;

        // Set up the credentials
        if (http_authentication == 1)
        {

            // method 1: Doesn't work
            NetworkCredential myNetworkCredential = new NetworkCredential(http_username, http_password);
            CredentialCache myCredentialCache = new CredentialCache();
            myCredentialCache.Add(myUri, "Basic", myNetworkCredential);
            request.PreAuthenticate = true;
            request.Credentials = myCredentialCache;

            // Method 2: doesn't work
            ICredentials credentials = new NetworkCredential( "edward", "tester", "http://alienauthoritythegame.com"); //I used my username and password here
            request.Credentials = credentials;

            // Method 3: doesn't work
            System.Net.NetworkCredential netCredential = new System.Net.NetworkCredential("edward", "tester", "http://alienauthoritythegame.com");
            request.Credentials = netCredential;

            // Method 4: doesn't work
            string authInfo = http_username + ":" + http_password;
            authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(authInfo));
            request.Headers["Authorization"] = "Basic " + authInfo;

            // Method 5: doesn't work
            byte[] credentialBuffer = new UTF8Encoding().GetBytes("edward" + ":" + "tester");
            request.Headers["Authorization"] = "Basic " + Convert.ToBase64String(credentialBuffer);
        }

        // Creates a 401 every time
        WebResponse response = request.GetResponse();
   }
   catch (Exception webEx)
   {
        Response.Write(webEx.ToString());
   }