public class Post
    {
        public string Title { get;  set; }
        public string Description { get;  set; }
        private DateTime _whenCreated;
        private int _voteValue;

        public Post()
        {
            _whenCreated = DateTime.Now;
            _voteValue = 0;
        }

        public void UpVote()
        {
            _voteValue++;
        }

        public void DownVote()
        {
            _voteValue--;
        }

        public int GetVoteValue()
        {
            return _voteValue;
        }
    }