Inheritance: INotifyPropertyChanging, INotifyPropertyChanged
 partial void DeleteMeterFileGroup(MeterFileGroup instance);
 partial void InsertMeterFileGroup(MeterFileGroup instance);
 partial void UpdateMeterFileGroup(MeterFileGroup instance);
		private void detach_MeterFileGroups(MeterFileGroup entity)
		{
			this.SendPropertyChanging();
			entity.Meter = null;
		}