private FileStorageCacheService(string baseFolder)
        {
            this._baseFolder = baseFolder;


            var directory = new DirectoryInfo(baseFolder);

            if (!directory.Exists)
            {
                directory.Create();
                _lastUpdated = null;
            }
            
            _monitor = new FileMonitoringService(baseFolder);
            _monitor.Changed += FileChanged;
        }
        private FileStorageCacheService(string baseFolder)
        {
            this._baseFolder = baseFolder;


            var directory = new DirectoryInfo(baseFolder);

            if (!directory.Exists)
            {
                directory.Create();
                _lastUpdated = null;
            }

            _monitor          = new FileMonitoringService(baseFolder);
            _monitor.Changed += FileChanged;
        }