NHibernate one-to-many mapping

Answer 1

Just answered here

Answer 2

Try this:

public class Person {
    public virtual int Id { get; set; }
    public virtual string FirstName { get; set; }
    public virtual IList<PersonAddress> PersonAddress { get; set; }
    ... }

public class PersonAddress {
    public virtual int Id { get; set; }
    public virtual Person Person { get; set; }
    ... }

You should have a reference to the Person, and not just a PersonId. And if you have difficulties with the .hbm.xml mapping files, consider using Fluent NHibernate instead. Its automatic mapping feature works like a charm.

There is also a video series on NHibernate, which covers the subject pretty well.