Object Relational Mapping (ORM) using NHibernate - Part 4 of 8 Coding Optional One-to-Many Entity Associations

A full series of 8 part articles to show One-To-One, Many-To-One, Many-To-Many associations mapping using NHibernate, Using Collections With NHibernate, Inheritance Relationships Using NHibernate, Lazy Initializations/Fetches Using NHibernate.