Htmlagilitypack after login to Https Website with HttpWebRequest?

I want to parse some html site like pluralsight,Forexample ([login to view URL]), So How can I first login site programmaticaly (without using webbrowser control) then call another url (for example : [login to view URL]) and get response and parse with Htmlagility pack. But I've written a login code, but I do not know the next step. public class Login { private CookieContainer Cookies = new CookieContainer(); public void SiteLogin(string username, string password) { Uri site = new Uri("[login to view URL]"); HttpWebRequest wr = (HttpWebRequest)[login to view URL](site); [login to view URL] = "Post"; [login to view URL] = "application/x-www-form-urlencoded"; [login to view URL] = "[login to view URL]"; [login to view URL] = Cookies; var parameters = new Dictionary<string, string>{ {"realm", "vzw"}, {"goto",""}, {"gotoOnFail",""}, {"gx_charset", "UTF-8"}, {"rememberUserNameCheckBoxExists","Y"}, {"IDToken1", username}, {"IDToken2", password} }; string input = [login to view URL]; using (var requestStream = [login to view URL]()) using (var writer = new StreamWriter(requestStream, [login to view URL])) [login to view URL](ParamsToFormEncoded(parameters)); using (var response = (HttpWebResponse)[login to view URL]()) { if ([login to view URL] == [login to view URL]) { //but I do not know the next step. } } } private string ParamsToFormEncoded(Dictionary<string, string> parameters) { return [login to view URL]("&", [login to view URL](kvp => [login to view URL]([login to view URL]).Replace("%20", "+") + "=" + [login to view URL]([login to view URL]).Replace("20%", "+") ).ToArray()); } } Attach a file I wrote a code to log in