public class Person

    {

        private Random random = new Random(DateTime.Now.Second);

        private int _randomOffset = ;

        public int _money;

        public int Money

        {

            get {

                return _money ^ _randomOffset;

            }

           private set

            {

                _money = value;

                _randomOffset = random.Next();

                _money ^= _randomOffset;

            }

        }

        public void ChangeMoney(int changeValue)

        {

            Money = Money + changeValue;

        }

    }