gtkhtml-sharp 2.12.0.0 Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details. Event data. The event invokes delegates which pass event data via this class. GLib.SignalArgs Constructor Public Constructor. Create a new instance with this constructor if you need to invoke a delegate. Property Gtk.HTMLStream An object for the HTML from the URL as it opens. a Property System.String The URL that was requested. A string containing the URL.