[原创]给Asp.Net初学者的关于继承和多态性的例子[3]

    writer.writeelementstring("phonenumber",_phonenumber);
    writer.writeelementstring("address1",_address1);
    writer.writeelementstring("address2",_address2);
    writer.writeelementstring("city",_city);
    writer.writeelementstring("state",_state);
    writer.writeelementstring("postal",_postal);
  writer.writeendelement();
  writer.flush();
  writer.close();
   }
   catch(exception ee)
   {
     console.writeline("exception:{0}",ee.tostring());
   }
 }
}