How to stop the connection from loading a million times, in my http post request with xml data c#

How to stop the connection from loading a million times, so it can read my post request and receive the xml data and select the data I need quickly in my c# program

So I have a HTTP post request going to the server then the server is responding back in sending me data about user like userID in xml format. Then I read in the information via this code.. But it takes a while to read in from the response. And according to fiddler I can see that it keeps sending a post request to the php ( alot). How do I stop this so my program can post once and select the data so the data can be received quickly. Thanks.

             //read response
        var xml = new StreamReader(response.GetResponseStream()).ReadToEnd();
        response.close();


        // XML TYPES
        XmlDocument xml2 = new XmlDocument();
        xml2.LoadXml(xml);
        // select data
        XmlNodeList info = xml2.SelectNodes("/UserInfo/");
        foreach (XmlNode u in info)
        {


            string id = u["id"].InnerText;
            string username = u["username"].InnerText;
            string money = u["money_owed"].InnerText;
            UID.Text = id;
            username.Text = username;
            OWED.Text = money;

        }