request with cookies

 public static string GetResponseWithCookies(string url, Dictionary<string, string> cookieNameValues) {
            using (var webClient = new WebClient()) {
                var uri = new Uri(url);
                var webRequest = WebRequest.Create(uri);
                foreach (var nameValue in cookieNameValues) {
                    webRequest.TryAddCookie(new Cookie(nameValue.Key, nameValue.Value, "/", uri.Host));
                }
                var response = webRequest.GetResponse();
                var receiveStream = response.GetResponseStream();
                var readStream = new StreamReader(receiveStream, Encoding.UTF8);
                var htmlCode = readStream.ReadToEnd();
                return htmlCode;
            }
        }

        static public bool TryAddCookie(this WebRequest webRequest, Cookie cookie) {
            HttpWebRequest httpRequest = webRequest as HttpWebRequest;
            if (httpRequest == null) {
                return false;
            }

            if (httpRequest.CookieContainer == null) {
                httpRequest.CookieContainer = new CookieContainer();
            }

            httpRequest.CookieContainer.Add(cookie);
            return true;
        }