MyDownloader.Spider.Parsers.Html.HtmlParser.GetEnumerator C# (CSharp) Method

        private static IEnumerable<Uri> GetEnumerator(Regex regExpr, string baseUrl, string html)
        {
            for (Match m = regExpr.Match(html); m.Success; m = m.NextMatch())
            {
                string href = m.Groups[1].ToString();

                // filter non-real relation urls:
                if (String.IsNullOrEmpty(href) ||
                    href.StartsWith("#") ||
                    href.StartsWith("mailto:") ||
                    href.StartsWith("javascript:"))
                {
                    continue;
                }

                href = System.Web.HttpUtility.HtmlDecode(href);

                Uri uri = null;
                try
                {
                    uri =  ConvertToAbsoluteUrl(href, baseUrl);
                }
                catch (Exception)
                {
                }

                if (uri != null)
                {
                    yield return uri;
                }
            }
        }