gdk-sharp 2.0.0.0 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 System.Boolean Returns true if the display was closed due to an error. True if the display was closed due to an error. None.