private static async void Save(IEnumerable <string> keys)
        {
            if (_Logger.IsDebugEnabled)
            {
                _Logger.Debug("Saving the updaters");
            }

            try
            {
                var data = await TaskEx.Run(() => JsonConvert.SerializeObject(keys));

                IsolatedStorageSettings.ApplicationSettings["updaters"] = data;

                await IsolatedStorageSettings.SaveAsync();

                if (_Logger.IsDebugEnabled)
                {
                    _Logger.Debug("Saved the updaters");
                }
            }
            catch (Exception exp)
            {
                if (_Logger.IsWarnEnabled)
                {
                    _Logger.Warn(exp, "Error while saving updaters.");
                }
            }
        }