partial void DeleteAct(Act instance);
 partial void UpdateAct(Act instance);
		private void detach_Acts(Act entity)
		{
			this.SendPropertyChanging();
			entity.Gig = null;
		}
 partial void InsertAct(Act instance);
		private void attach_Acts(Act entity)
		{
			this.SendPropertyChanging();
			entity.Gig = this;
		}