System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.
   at System.String.InternalSubString(Int32 startIndex, Int32 length)
   at System.String.Substring(Int32 startIndex, Int32 length)
   at HtmlAgilityPack.HtmlNode.get_OuterHtml()
   at HtmlAgilityPack.HtmlNode.WriteTo(TextWriter outText)
   at HtmlAgilityPack.HtmlNode.WriteContentTo(TextWriter outText)
   at HtmlAgilityPack.HtmlNode.WriteTo(TextWriter outText)
   at HtmlAgilityPack.HtmlNode.WriteContentTo(TextWriter outText)
   at HtmlAgilityPack.HtmlNode.WriteTo(TextWriter outText)
   at HtmlAgilityPack.HtmlNode.WriteContentTo(TextWriter outText)
   at HtmlAgilityPack.HtmlNode.WriteTo(TextWriter outText)
   at HtmlAgilityPack.HtmlNode.WriteContentTo(TextWriter outText)
   at HtmlAgilityPack.HtmlNode.WriteTo(TextWriter outText)
   at HtmlAgilityPack.HtmlNode.WriteTo()
   at HtmlAgilityPack.HtmlNode.get_OuterHtml()
   at sidearm.MarkupParser.do_html_transforms(String content, IEnumerable`1 transforms)
   at sidearm.MarkupParser.DoHtmlTransforms(String content, HttpContext context)