public string[] getAllDashboardOneSettings() // convert to json { string[] jsonArray; List <DashboardOnePriceSettings> priceSettings; try { priceSettings = _stockScreenerService.GetPriceSettings(); jsonArray = new string[priceSettings.Count]; } catch (Exception ex) { if (ex is System.ArgumentNullException) { Console.WriteLine("Exception " + ex); } Console.WriteLine("Exception " + ex); return(null); } for (int i = 0; i < priceSettings.Count; i++) { jsonArray[i] = JsonSerializer.Serialize(priceSettings[i]); } return(jsonArray); }