private void ClickNewTopic(object o)
        {
            EditTopicWindow topicDialog = new EditTopicWindow();

            topicDialog.TopicValue = "";
            topicDialog.ShowDialog();
            if (topicDialog.DialogResult == true)
            {
                TopicDTO topic = new TopicDTO()
                {
                    Topic = topicDialog.TopicValue
                };
                long newId = BibleBeliefsRepository.CreateTopic(topic);
                Topics = BibleBeliefsRepository.GetTopics();
                var t = Topics.Single(s => s.Id == newId);
                if (t != null)
                {
                    SelectedTopic = t;
                }
                else
                {
                    SelectedTopic = Topics[0];
                }
            }
        }