C# DynDNS和无可争议的Badath反应

我正在尝试使用DynDNS API验证用户提供的DynDNS凭据，并说这正是为了验证用户提供的DynDNS凭据。
我的想法是，我可以使用用户凭据自动更新，并查找badauth响应，并使用它来检测不正确的凭据，这听起来很完美。
问题是我得到的唯一回应是badauth。当我发送应该是好的凭证时（因为它们当前用于登录和所有操作），我会收到一个BADATH响应。这是我的密码：

   try
   {
     string target = string.Format( "http://{0}:{1}@members.dyndns.org:8245/nic/update?hostname={2}&myip={3}",
      HttpUtility.UrlEncode( DynDnsUserName ), HttpUtility.UrlEncode( DynDnsPassword ), HttpUtility.UrlEncode( DynDnsURL ), ip );
     HttpWebRequest request = WebRequest.Create( target ) as HttpWebRequest;
     request.Method = "GET";
     request.UserAgent = company + " - " + model + " - " + firmware;
     HttpWebResponse response = request.GetResponse() as HttpWebResponse;
     Stream reply = response.GetResponseStream();
     StreamReader readReply = new StreamReader( reply );
     string returnCode = readReply.ReadToEnd();
     Trace.WriteLine( "We've validated the provided DynDNS credentials, response received: " + returnCode );
     return !returnCode.Contains( "badauth" );
   }
   catch (WebException webEx)
   {
     Trace.WriteLine( "WebException thrown: " + webEx.Message );
     if (webEx.Response != null)
     {
      Stream reply = webEx.Response.GetResponseStream();
      StreamReader readReply = new StreamReader( reply );
      Trace.WriteLine( "Actual response: " + readReply.ReadToEnd() );
     }
   }

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无论我使用何种凭据，我都会收到一个抛出的WebException“远程服务器返回错误：（401）未经授权”，响应主体为badauth。有什么想法吗

{0}:{1}@。。。不适用于webrequest

你的目标只是“http://members.dynd....“，然后你做了类似的事情

NetworkCredential myCredentials = new NetworkCredential(username,passwd);

request.Credentials = myCredentials;

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嗯，课程和方法表明它应该有效，但这很可能是我不正确的假设。我会调查的，谢谢。太棒了，你完全正确！尽管API文档本身一直使用Uri嵌入凭据方法，但它实际上并不起作用。切换到指定凭证的更具体的方法使一切都完美地工作。就在几周前，我遇到了这个问题。