public class CounterNoLock:CountBase

    {

        private int _count;

        public int Count

        {

            get

            {

                return _count;

            }

        }

        public override void Increment()

        {

            Interlocked.Increment(ref _count);

        }

        public override void Decreament()

        {

            Interlocked.Decrement(ref _count);

        }

    }