gtk-sharp Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details. Gtk.MenuItem A separator used in menus. A separator used in menus. The is a used to group items within a . It displays a horizontal line with a shadow to make it appear sunken into the interface. Constructor Creates a new . Creates a new . Gtk.SeparatorMenuItem smi = new Gtk.SeparatorMenuItem (); Constructor Pointer to the C object. Internal constructor This is an internal constructor, and should not be used by user code. Property GLib.GType GType Property. a Returns the native value for .