House.House.onTimeChange C# (CSharp) Method

        public override void onTimeChange(TimeChangedEvent Event)
        {
            if (Math.Abs(Event.GetTime - lastTime) > 10000)
            {
                Program.tConsole.WriteLine("Saving house.xml");
                SaveHouseData();
                lastTime = Event.GetTime;
            }
             	        base.onTimeChange(Event);
        }