gtk-sharp 2.10.0.0 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. 's RetVal is a boolean. To keep a from closing, set 's .RetVal to true. GLib.SignalArgs Constructor Public Constructor. Create a new instance with this constructor if you need to invoke a delegate. Property Gdk.Event The event that triggered this window's deletion. a