System.Configuration.SectionUpdates.GetUpdate C# (CSharp) Метод

        private Update GetUpdate(string configKey) {
            Update update = (Update) _sections[configKey];
            if (update != null) {
                if (update.Retrieved) {
                    update = null;
                }
                else {
                    update.Retrieved = true;
                    _cUnretrieved--;
                    if (update.Moved) {
                        _cMoved--;
                    }
                }
            }

            return update;
        }