html agility pack and triangular brackets in text
See the question and my original answer on StackOverflowThis happens because your original html is too invalid. It should be:
<span class='title'> Launching app results in an error "Activation of http://<server name="">/TemplateBuilder/?language=1033&locale=1033 resulted in exception"</span>
This kind of malformed html cannot be detected by the Html Agility Pack.