.NET object-relational mapping tools

object-relational mapping framework for ADO.NET

NHibernate is a port of the Hibernate object–relational mapping (ORM) framework for the Microsoft .NET platform. It provides a framework for mapping an object-oriented domain model to a traditional relational database. It is used to map an object-oriented domain model to a relational database, aiming to reduce the amount of manual coding required for data persistence. NHibernate is free and open-source software, distributed under the GNU Lesser General Public License.