ADO.NET Entity Framework

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 EntitiesEntity Framework Features:

Entity DesignerGenerate 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 changesAdd, Delete, and Edit Entities; Scalar properties; Associations; and InheritanceAutomatic set managementAutomatic Navigation property managementError reportingValidate model and mappings using Entity Framework Runtime

Entity MappingView the mapping for a C-Side Entity or Association

Rename or delete C-Side objects without worrying about mappingMap an EntityType to multiple tablesApply multiple conditions to a table mappingMap associationsAutomatic generation of conditions and referential constraints on associationsTPH: Map an Entity hierarchy to a single tableTPT: Map an Entity hierarchy to multiple tables

Entity Model BrowserUnderstand and visualize the model in a tree hierarchy

Visually relate shapes on the designer surface with hierarchy in model

Visual Studio IntegrationSupport 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 buildSupport for multiple Visual Studio editions: Express, Standard, Pro, and VSTS.ADO.NET team blog

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相关资源：ADO.NET sql、LINQ to sql、ADO.NET Entity Framework(EF)数据库连接性能比较