Web Service调用Nhibernate数据访问异常:xx cannot be serialized because it does not have a parameterless constructor
webservcie调用nHibernate的数据访问代码读取数据库并生成一个实体实例时,得到了如下异常信息: Anexceptionoftype'System.Web.Services.Protocols.SoapException'occurredinSystem.Web.Services.dllbutwasnothandledinusercodeAdditionalinformation:S