gtk-sharp2.12.0.0Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details.Dictates how a is refreshed when its value is updated.System.EnumGLib.GType(typeof(Gtk.SpinButtonUpdatePolicyGType))FieldGtk.SpinButtonUpdatePolicyWhen refreshing a , the value is always displayed.FieldGtk.SpinButtonUpdatePolicyWhen refreshing a , the value is only displayed if it is valid. A value is valid if it lies within the bounds of the spin button's .