Fluent NHibernate uses strongly typed C# classes to map the properties of the model classes to the corresponding fields of the database tables. Here’s the mapping class named ProductMap.

Architecturally, NHibernate is based on Java’s Hibernate ORM. Ricardo writes, In NHibernate, there is a separation between the Unit of Work and the configuration and model instances.

NHibernate isn't exposed to the controllers or views, all of that happens inside of the services. Your NHibernate session is therefore only alive inside of a single service call.