private static String[] getServicesByUserIDTest(String[] tk) { try { List <Service> serviceList = sm.getServicesByUserID(int.Parse(tk[1])); Console.WriteLine("serviceID\t\tnameService\n"); return(serviceList.Select(c => c.serviceID + "\t\t\t" + c.nameService).ToArray()); } catch { return(str2arr("Missing/Invalid argument.Usage: getServicesByUserIDTest <UserID>")); } }