ADO.NET Entity Framework 是微软以 ADO.NET 为基础所发展出来的对象关系对应 (O/R Mapping) 解决方案。该框架曾经为.NET Framework的一部分，但version 6之后从.NET Framework分离出来
Entity Data Model (EDM) ，将数据逻辑层切分为三块，分别为 Conceptual Schema, Mapping Schema 与 Storage Schema 三层，其上还有 Entity Client，Object Context 以及 LINQ 可以使用。(ADO.NET Entity Framework is a Microsoft ADO.NET based development of the object relation (O/R Mapping) solutions. The framework used as part of the.NET Framework, but version 6 from.NET Framework isolated
Entity Data Model (EDM), the data logic layer is divided into three blocks, respectively Conceptual Schema, Mapping Schema and Storage Schema three, the Entity and Client, Object Context and LINQ can be used)