public IHttpActionResult Post([FromUri] int topicId, [FromBody] Reply reply)
        {
            if (reply == null)
            {
                return(BadRequest());
            }
            reply.TopicId = topicId;
            reply.Created = DateTime.UtcNow;

            _repo.AddReply(reply);
            if (!_repo.Commit())
            {
                return(BadRequest());
            }
            return(Created("", reply));
        }