C# check url response

on_click.cs

                // Response
                try 
                {
                    using (var response = (HttpWebResponse)httpWReq.GetResponse() as HttpWebResponse)
                    {
                        if (httpWReq.HaveResponse && response != null)
                        {
                            using (var reader = new StreamReader(response.GetResponseStream())) {
                                string result = reader.ReadToEnd();

                                Microsoft.Win32.RegistryKey token;
                                token = Microsoft.Win32.Registry.CurrentUser.CreateSubKey("Cluey");
                                token.SetValue("Token", result);
                                token.Close();

                                System.Windows.Forms.MessageBox.Show("Successful login!");
                                System.Windows.Forms.Form.ActiveForm.Text = "Cluey Terminal";
                                //button1.Text = "Terminal Validation";
                            }
                        }
                    }
                }

                catch (WebException wex)
                {
                    if (wex.Response != null)
                    {
                        using (var errorResponse = (HttpWebResponse)wex.Response)
                        {
                            using (var reader = new StreamReader(errorResponse.GetResponseStream()))
                            {
                                string error = reader.ReadToEnd();
                                System.Windows.Forms.MessageBox.Show(error);
                                System.Windows.Forms.Form.ActiveForm.Text = "Cluey Terminal";
                                //button1.Text = "Terminal Validation";
                                Console.WriteLine(System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable());
                            }
                        }
                    }
                }