private async void PostStory(object sender, RoutedEventArgs arg)
        {
            var title  = StoryTitle.Text;
            var url    = StoryUrl.Text;
            var reason = StoryReason.Text;

            if (CurrentCircle == null)
            {
                PopupMessage.DisplayMessageInRes("PostToCircleNeedCircle");
                return;
            }

            if (string.IsNullOrEmpty(url) || string.IsNullOrEmpty(title))
            {
                PopupMessage.DisplayMessageInRes("PostToCircleError");
                return;
            }

            await DataRequester.PostToCircle(url, title, reason, new List <int>() { CurrentCircle.Id });

            PopupMessage.DisplayMessageInRes("PostToCircleSuccess");
            NavigationManager.Instance.GoBack();
        }