HttpWebRequest仅发送Get请求，而不发布

Question

im trying to send POST request using HttpWebRequest and fiddler shows me that im sending GET? any help will be appreciated since im able to see what im doing wrong.

code :

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(LOGIN_API_BASE_URL);
        string postString = string.Format("api_email={0}&api_password={1}", EMAIL, PASSWORD);
        ASCIIEncoding encoding = new ASCIIEncoding();
        byte[] data = encoding.GetBytes(postString);
        CookieContainer cookies = new CookieContainer();
        request.CookieContainer = cookies;
        //request.AllowWriteStreamBuffering = true;
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";
        request.ContentLength = data.Length;
        request.Timeout = i_timeout;
        //request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1";
        //request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
        //request.Referer = "https://accounts.craigslist.org";

        using (Stream writer  = request.GetRequestStream())
        {
            writer.Write(data, 0, data.Length);
            //writer.Close();
        }

        StreamReader responseReader = new StreamReader(request.GetResponse().GetResponseStream());
        string responseData = responseReader.ReadToEnd();

        responseReader.Close();
        request.GetResponse().Close();

Answer 1

ok found the problem, the url im sending the request to is http://domain.com and when i send it to http://www.domain.com it works and send a post. so new question why is that? ( the answer will get the answer to my question as i dont like the idea of voting my self )