public List <dynamic> GetSubscriptions()
        {
            var cachedSubscribers = _cache.Get(_allSubscribersCacheKey) as List <dynamic>;

            if (cachedSubscribers != null)
            {
                return(cachedSubscribers);
            }

            var subscribers = StorageMethod.GetAllSubscriptions();

            if (subscribers != null && subscribers.All(x => x.Version == VersionNumber))
            {
                var subscribersFromStroage = subscribers.ToDynamics();
                _cache.Add(_allSubscribersCacheKey, subscribersFromStroage, MyCachePriority.Default);
                return(subscribersFromStroage);
            }

            subscribers = JsonConvert.DeserializeObject <List <SubscriberModel> >(_webClientService.GetSubscriptions());
            if (subscribers == null)
            {
                return(null);
            }
            StorageMethod.AddOrUpdateSubscribers(subscribers);

            var all = subscribers.ToDynamics();

            _cache.Add(_allSubscribersCacheKey, all, MyCachePriority.Default);

            return(all);
        }