NHibernate:如何在一对一映射上启用延迟加载

public class Person
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual Address Address { get; set; }
}

public class Address
{
    public virtual int Id { get; set; }
    public virtual string Street { get; set; }
    public virtual string City { get; set; }
    public virtual string State { get; set; }
    public virtual string Zip { get; set; }
}

 <class name="Person" table="persons">
    <id name="Id">
     <generator class="identity" />
    </id>
   <property name="Name" />
    <one-to-one name="Address" class="Address" cascade="all" lazy="proxy" />
  </class>
</hibernate-mapping>

using (var session = sessionFactory.OpenSession())
{
    using (var transaction = session.BeginTransaction())
    {
        var person = session.Get<Person>(1);
        var address = person.Address;
        transaction.Commit();
    }
}