BruTile.GoogleMaps.GoogleV3TileProvider.Fetch C# (CSharp) Метод

        private byte[] Fetch(string url)
        {
            WebRequest wq = WebRequest.Create(url);
            var httpWebRequest = wq as HttpWebRequest;
            if (httpWebRequest != null)
            {
                httpWebRequest.UserAgent = UserAgent;

                httpWebRequest.Referer = m_referer;
                httpWebRequest.KeepAlive = false;
                httpWebRequest.AllowAutoRedirect = true;
                httpWebRequest.Timeout = 5000;
            }

            byte[] ret;
            using (WebResponse resp = wq.GetResponse())
            {
                if (resp.ContentType.StartsWith("image", StringComparison.OrdinalIgnoreCase))
                {
                    using (Stream responseStream = resp.GetResponseStream())
                    {
                        ret = Utilities.ReadFully(responseStream);
                        if (responseStream != null)
                        {
                            responseStream.Close();
                        }
                    }
                }
                else
                {
                    string message = ComposeErrorMessage(resp, url);

                    if (m_logger.IsDebugEnabled)
                    {
                        m_logger.DebugFormat("Error fetching tile: {0}", message);
                    }

                    throw (new Web.WebResponseFormatException(message, null));
                }
                resp.Close();
            }
            return ret;
        }