Blacker.Scraper.Downloader.GetPageImageUrl C# (CSharp) Метод

        private static string GetPageImageUrl(string imageXPath, string pageUrl)
        {
            var document = WebHelper.GetHtmlDocument(pageUrl);
            var img = document.SelectSingleNode(imageXPath);
            if (img == null || !img.Attributes.Contains("src"))
            {
                throw new ParserException("Could not find expected elements on website.", document.InnerHtml);
            }

            return img.Attributes.First(a => a.Name == "src").Value;
        }