The Status of ORM on .NET Platform

Object/Relation Mapping(ORM). is accrued by development of object oriented that is a method of development software. Object oriented is main current method in application development environment. Relational database is main current data storage system what hold data for long in application environment. Object and relational data are two behavior forms of business entity. Business entities represent as object in internal memory, and represent as relational data in database. Objects in internal memory have association and inheritance relationships. But in database, relational data can not express many to many association and inheritance relationships directly. So that, ORM is born and exist as mesosphere that be the mapping between program objects and data in relational database.