C# 如何在EF7中修复此错误？

我正在尝试开始使用

EF7

我现在正试着跑步

我得到以下错误：

这是我的

packages.config

：

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="EntityFramework.Commands" version="7.0.0-rc1-final" targetFramework="net452" />
  <package id="EntityFramework.Core" version="7.0.0-rc1-final" targetFramework="net452" />
  <package id="EntityFramework.Relational" version="7.0.0-rc1-final" targetFramework="net452" />
  <package id="EntityFramework.Relational.Design" version="7.0.0-rc1-final" targetFramework="net452" />
  <package id="EntityFramework.SqlServer" version="7.0.0-beta8" targetFramework="net452" />
  <package id="EntityFramework.SqlServer.Design" version="7.0.0-beta8" targetFramework="net452" />
  <package id="Ix-Async" version="1.2.5" targetFramework="net452" />
  <package id="Microsoft.Extensions.Caching.Abstractions" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.Caching.Memory" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.Configuration" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.Configuration.Abstractions" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.Configuration.Binder" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.DependencyInjection" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.DependencyInjection.Abstractions" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.Logging" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.Logging.Abstractions" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.OptionsModel" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Microsoft.Extensions.Primitives" version="1.0.0-rc1-final" targetFramework="net452" />
  <package id="Remotion.Linq" version="2.0.1" targetFramework="net452" />
  <package id="System.Collections.Immutable" version="1.1.36" targetFramework="net452" />
  <package id="System.Diagnostics.DiagnosticSource" version="4.0.0-beta-23516" targetFramework="net452" />
  <package id="System.Diagnostics.Tracing" version="4.0.0" targetFramework="net452" />
  <package id="System.Runtime" version="4.0.0" targetFramework="net452" />
  <package id="System.Threading" version="4.0.0" targetFramework="net452" />
</packages>

那么问题是什么呢

---

注意：我使用的是

Windows10Pro

和

VS Enterprise 2015

您必须删除EF.SqlServer并安装EF.MicrosoftSqlServer包，因为您不能混合使用beta8和rc1组件

无法复制它，我基本上使用相同的设置。我们项目之间的一个区别是，我的项目既没有引用EntityFramework.SqlServer，也没有引用EntityFramework.SqlServer.Design。Mine仅引用EntityFramework.MicrosoftSqlServer。-不确定这是否相关。@DanOrlovsky，好的。我刚刚尝试了EntityFramework。MicrosoftSqlServer给出了相同的错误。刚刚发现：可能与您的问题有关。请尝试将OnConfiguration签名更改为：protected override OnConfiguration（EntityOptions Builder Options Builder）@DanOrlovsky，No。它不起作用。我使用的是rc1。他们在谈论beta 5。

The 'packages' element is not declared.