ORMs are not just certain products like LINQ To SQL, Entity Framework, NHibernate, LLBLGen. It’s a design pattern that each ORM vendor has his own understanding of it and way of implementing. In this session we go through the most common implementation patterns with code examples in NHibernate and remarks on how other ORMs implement the same functionality (or not). We are likely to talk about many language, framework features and tools like Expression Trees and Reflection and code generation.