상속: INotifyPropertyChanging, INotifyPropertyChanged
 partial void DeleteMeterLine(MeterLine instance);
 partial void UpdateMeterLine(MeterLine instance);
		private void detach_MeterLines(MeterLine entity)
		{
			this.SendPropertyChanging();
			entity.Meter = null;
		}
 partial void InsertMeterLine(MeterLine instance);
		private void attach_MeterLines(MeterLine entity)
		{
			this.SendPropertyChanging();
			entity.Meter = this;
		}