gtk-sharp2.12.0.0Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details.Set the type of new elements that are added to a . is used to set the type of new elements that are added to a .System.EnumGLib.GType(typeof(Gtk.ToolbarChildTypeGType))FieldGtk.ToolbarChildTypeAdd blank space to the toolbar.FieldGtk.ToolbarChildTypeAdd buttons to the toolbar.FieldGtk.ToolbarChildTypeAdd toggle buttons to the toolbar.FieldGtk.ToolbarChildTypeAdd radio buttons to the toolbar.FieldGtk.ToolbarChildTypeAdd widgets to the toolbar.