private FetchHistory GetHistory()
        {
            string jsonFile = HistoryFilePath();

            try
            {
                if (System.IO.File.Exists(jsonFile))
                {
                    if (History == null)
                    {
                        string json = System.IO.File.ReadAllText(jsonFile);
                        History = FetchHistory.FromJson(json);
                    }

                    return(History);
                }

                History = new FetchHistory();
            }
            catch (Exception)
            {
                History = new FetchHistory();
            }

            return(History);
        }