gdk-sharp0.0.0.0neutralGtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details.Describes how existing data is combined with new data.None.System.EnumSystem.IComparableSystem.IConvertibleSystem.IFormattableFieldGdk.PropModeThe new data replaces the existing data.FieldGdk.PropModeThe new data is prepended to the existing data.FieldGdk.PropModeThe new data is appended to the existing data.FieldSystem.Int32Internal field.Do not use.