作为下一代 ADO.NET 3.0 的开发框架，Entity Framework 让我们从复杂的关系数据模型中解脱出来，使用更加符合面向对象的实体数据模型(Entity Data Model)来完成业务设计和开发。
Entity Framework 很像 NHibernate，同样采取 XML 进行映射。不过借助于强大的可视化设计工具和向导，我们可以非常方便地完成这些头疼的工作。 Entity Framework 对 Linq 的直接支持 —— LINQ to Entities
Entity Framework Features:
- Entity Designer
Generate a model from a database (via wizard) and display it on the designer surface
Edit conceptual model properties (namespace, alias, etc.)
Control visual aspects of the design surface (layout) and persist changes
Add, Delete, and Edit Entities; Scalar properties; Associations; and Inheritance
Automatic set management
Automatic Navigation property management
Error reporting
Validate model and mappings using Entity Framework Runtime
- Entity Mapping
View the mapping for a C-Side Entity or Association
Rename or delete C-Side objects without worrying about mapping
Map an EntityType to multiple tables
Apply multiple conditions to a table mapping
Map associations
Automatic generation of conditions and referential constraints on associations
TPH: Map an Entity hierarchy to a single table
TPT: Map an Entity hierarchy to multiple tables
- Entity Model Browser
Understand and visualize the model in a tree hierarchy
Visually relate shapes on the designer surface with hierarchy in model
- Visual Studio Integration
Support for C# and VB in multiple project types: ASP.NET Web site, ASP.NET Web Application Project, Console, WinForms, and Library
Project system integration: item template for .edmx file, model generation wizard, EdmxDeploy.exe, and Entity Framework validation on build
Support for multiple Visual Studio editions: Express, Standard, Pro, and VSTS.
ADO.NET team blog
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