private static String[] getContactsByUserIDTest(String[] tk) { try { List <Contact> contactList = sm.getContactsByUserID(int.Parse(tk[1])); Console.WriteLine("contactID\texternalUserID\t\t\t\tnameContact\n"); return(contactList.Select(c => c.contactID + "\t\t" + c.externalUserID + "\t\t\t\t" + c.nameContact).ToArray()); } catch { return(str2arr("Missing/Invalid argument.Usage: getContactsByUserIDTest <User ID>")); } }