NHibernate帮助类

    public class NHibernateHelper
    {
        public static string oracle = System.Configuration.ConfigurationManager.AppSettings["Oracle"];

        private static Configuration cfg;
        private static ISessionFactory sessionFactory;
        public static ISessionFactory GetSessionFactory()
        {
            return sessionFactory;
        }
        static NHibernateHelper()
        {
            try
            {
                cfg = new Configuration();
                sessionFactory = cfg.Configure().BuildSessionFactory();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }