public class Order
{
  IOrderDal dal = DALFactory.DataAccess.CreateOrder();
  logger = new Logger();
  public void Inerst(OrderInfo order)
  {
    dal.Insert(order);
    logger.log(orderInfo.ToString(),"Insert",DateTime.Now.ToString());
  }
public class Logger
{
  public void log(string description,string operation,string time)
  {
    ....//dosometing to persist the information
  }
}