private string GetHtml(string url)
        {
            var data    = "";
            var httpWeb = (HttpWebResponse)_webRequest.ExecuteRequest(url);

            if (httpWeb.StatusCode == HttpStatusCode.OK)
            {
                using var receiveStream = httpWeb.GetResponseStream();
                StreamReader readStream = null;

                if (string.IsNullOrWhiteSpace(httpWeb.CharacterSet))
                {
                    readStream = new StreamReader(receiveStream);
                }

                else
                {
                    readStream = new StreamReader(receiveStream, Encoding.Default);
                }

                data = readStream.ReadToEnd();
            }
            return(data);
        }