NHibernate中只读列表的最佳实践是什么？

    <id name="Id">
       <generator class="identity" />
    </id>
   <property name="Name" />
    <list name="Children" table="Children" cascade="all">
        <key column="ParentId" />
       <index column="Position" />
        <one-to-many class="Child" />
    </list>
</class>

public class Parent
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual IReadOnlyList<Child> Children { get; set; }
}