类型“System.Data.Entity.DbContext”在未被引用的程序集中定义。您必须添加一个引用程序集“的EntityFramework 2 [英] The type 'System.Data.Entity.DbContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'EntityFramework 2

问题描述

我有一个解决方案 - 一个项目是类库的.edmx与数据模型 另一种是asp.net web表单的项目。

I've got one solution - the one project is class library with .edmx data model The other is asp.net web forms project.

当我开始解我得到以下异常：

when i start the solution I get the following exception:

类型System.Data.Entity.DbContext'中未被引用的组件被定义。您必须添加一个引用程序集的EntityFramework，版本= 5.0.0.0，文化=中性公钥= b77a5c561934e089。

The type 'System.Data.Entity.DbContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

，当我看到我的asp.net项目中引用我看到关于我类我看不出参考实体框架。但问题是，实体框架，无论是在我的类库和已安装的Web项目

and when I see the references in my asp.net project I see the reference to my class and I can't see reference to entity framework. But the problem is that entity framework is installed both in my class library and web project

推荐答案

我觉得你的的EntityFramework 版本被搞糊涂了。

I think your EntityFramework version was confused

请使用的NuGet 软件包安装程序下载正确的版本。

Please download the correct version by using the NuGet package installer.

请参阅此讨论入门：<一href="http://stackoverflow.com/questions/5741109/the-type-or-namespace-name-dbcontext-could-not-be-found">The类型或命名空间名称的DbContext找不到

再看看这个同样的问题，答：是<一个href="http://forums.asp.net/t/1856121.aspx?%20System%20Data%20Entity%20DbContext%20is%20defined%20in%20an%20assembly%20that%20is%20not%20referenced">Here

And look this same problem and Answer : is Here

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