private void detach_Coupons(Coupon entity)
		{
			this.SendPropertyChanging();
			entity.CouponType = null;
		}
		private void attach_Coupons(Coupon entity)
		{
			this.SendPropertyChanging();
			entity.CouponType = this;
		}
 partial void UpdateCoupon(Coupon instance);
 partial void DeleteCoupon(Coupon instance);
 partial void InsertCoupon(Coupon instance);