.NET的ORM框架 EntityFramework 介紹
EntityFramework 是微軟公司為 .NET 開發人員推出的一個 ORM 框架，來實現對數據庫單表數據的創建、讀取、更新和刪除操作，也就是所謂的CRUD（C:Create/R:Read/U:Update /D:Delete）。需要說明的是，如果在VS2008中使用EntityFramework就需要安裝VS2008SP1。
- Applications can work in terms of a more application-centric conceptual model, including types with inheritance, complex members, and relationships.
- Applications are freed from hard-coded dependencies on a particular data engine or storage schema.
- Mappings between the conceptual model and the storage-specific schema can change without changing the application code.
- Developers can work with a consistent application object model that can be mapped to various storage schemas, possibly implemented in different database management systems.
- Multiple conceptual models can be mapped to a single storage schema.
- Language-integrated query (LINQ) support provides compile-time syntax validation for queries against a conceptual model.
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