School school = new School();

        school.SchoolName = TextBox2.Text;

        school.SchoolAddress = TextBox3.Text;

        school.HeadMaster = TextBox4.Text;

        school.SchoolId = TextBox1.Text;

        NHibernate.Cfg.Configuration cfg = new NHibernate.Cfg.Configuration();

        cfg.AddAssembly("Coln.Net.MyNHibernate");

        ISessionFactory factory = cfg.BuildSessionFactory();

        ISession s = factory.OpenSession();

        ITransaction t = s.BeginTransaction();

        s.Save(school);//程序在这里出错

        t.Commit();