How to retrive the requested parameter in responce

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C#

hello i wanted to retrieve the parameter in response page how can retrieve this.

What I have tried:

here from my class i am sending some parameter to the asp.net page.

string email = "YOUR EMAIL";
           string password = "YOUR PASSWORD";

           string URLAuth = "http://localhost:2013/Default.aspx";
           string postString = string.Format("name={0}&inputPassword={1}", email, password);

           const string contentType = "application/x-www-form-urlencoded";
           System.Net.ServicePointManager.Expect100Continue = false;

           CookieContainer cookies = new CookieContainer();
           HttpWebRequest webRequest = WebRequest.Create(URLAuth) as HttpWebRequest;
           webRequest.Method = "POST";
           webRequest.ContentType = contentType;
           webRequest.CookieContainer = cookies;
           webRequest.ContentLength = postString.Length;
           webRequest.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1";
           webRequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";

           StreamWriter requestWriter = new StreamWriter(webRequest.GetRequestStream());
           requestWriter.Write(postString);
           requestWriter.Close();

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

           responseReader.Close();
           webRequest.GetResponse().Close();

and i want to retrieve this parameter in default.aspx