如何修復EF7中的此錯誤？

Question

我正在嘗試開始使用EF7 。

這是我現在嘗試運行的示例 。

我收到以下錯誤：

這是我的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>

如您所見， EF.Core已在此處聲明。

我也有警告

The 'packages' element is not declared.

那是什么問題呢？

注意：我正在使用Windows 10 Pro和VS Enterprise 2015 。

Answer 1

您必須刪除EF.SqlServer並安裝EF.MicrosoftSqlServer軟件包，因為您不能混合使用beta8和rc1組件