AG_E_PARSER_UNKNOWN_ERROR
Let’s share a new bit of secret regarding the dreaded AG_E_PARSER_UNKNOWN_ERROR in Silverlight 3.
If you extend UserControl in class X, and you declare X’s constructor as private, you’ll get AG_E_PARSER_UNKNOWN_ERROR. Of course, you should never do such a foolish thing, but accidents happen, and this error is really difficult to track down, if you don’t have a good and easy to install source control system (and use it)…
