<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="MyHibernate.Model" assembly="Model">
    <class name="MyHibernate.Model.User" table="Users">
        <id name="Id">
            <generator class="native"></generator>
        </id>
        <property name="UserName"></property>
        <property name="Pwd"></property>
        <property name="CreateDate"></property>
        <property name="Power"></property>
    </class>
</hibernate-mapping>

 public class UserRepository:BaseRepository<User>
    {
        public IList<User> GetAllUser()
        {
            return _sessionFactory.Session().CreateQuery("from User").List<User>();
        }
    }