how to create an event for enum type value changed?

[Chan1314]

i creating an user control library , vs 2008, .net framework3.5,

how can i add a event trigger for an enum type?

        public enum period_type { Text, TrackBar };

        private period_type period_type_selected;

        public period_type Period_Type_Select { get { return period_type_selected; } set { period_type_selected = value; } }

how can i set the event when period_type_selected has changed? is it possible?

thx
chan