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.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.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)