private void PostThought(string caption, bool saveToFile)
        {
            if (string.IsNullOrEmpty(caption))
            {
                return;
            }

            Message message = new Message
            {
                ID         = Guid.NewGuid(),
                Caption    = caption,
                CreatedAt  = DateTime.Now,
                ReviewedAt = DateTime.Now,
                Status     = Status.Active,
                Subject    = this.Subject
            };


            ActiveThoughts.Add(message);
            if (saveToFile)
            {
                ActiveThoughts.Insert(0, message);
                messageRepository.SaveThoughts(ActiveThoughts);
            }

            PendingThought = string.Empty;
            RaiseUpdate("PendingThought");
            RaiseUpdate("ActiveThoughts");
        }
        private void timer_Elapsed(object sender, ElapsedEventArgs e)
        {
            ApplicationSession.Invoker.BeginInvoke(new Action(() =>
            {
                if (ActiveThoughts.Count == 0)
                {
                    return;
                }

                if (ReviewSession != null)
                {
                    ReviewSession.RepostCurrent();
                }

                Message message = ActiveThoughts[ActiveThoughts.Count - 1];
                ActiveThoughts.Remove(message);
                RaiseUpdate("ActiveThoughts");

                StaleThoughts.Add(message);
                RaiseUpdate("StaleThoughts");

                ReviewSession = new MessageReviewSession(message, result =>
                {
                    if (result.Status == Status.Active)
                    {
                        ActiveThoughts.Insert(0, result);
                        RaiseUpdate("ActiveThoughts");
                    }
                    ReviewSession = null;
                    RaiseUpdate("ReviewSession");
                });
                RaiseUpdate("ReviewSession");
            }), null);
        }