We have covered all the basic building blocks of NHibernate. Understanding mappings and configuration is key to learning how to use NHibernate and how to efficiently perform data access. As I have been stating, both mappings and configuration are huge topics and we have covered the most important aspects so far. We would keep coming back to these topics as we get deeper into our NHibernate journey. From the next chapter onwards, we are going to cover details around storing data in the database, different ways of retrieving data from database, and tweaking mappings/configuration in order to optimize the performance of data access.