XmlDocument dc = new XmlDocument();
            using (WebClient wb = new WebClient())
            {
                dc.LoadXml(wb.DownloadString(searchURL));
            }

<?xml version="1.0" encoding="UTF-8"?>

            Encoding sourceEncoding = Encoding.UTF8;
            Encoding targetEncoding = Encoding.Default;
            using (WebClient wb = new WebClient())
            {
                string text = wb.DownloadString(url);
                
                byte[] sourceBytes = sourceEncoding.GetBytes(text);
                byte[] targetBytes = Encoding.Convert(sourceEncoding, targetEncoding, sourceBytes);
                System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding();
                return enc.GetString(targetBytes);
            }