: System.IO.FileLoadException: Could not load file or assembly 'EntityFramework'

Question

System.IO.FileLoadException: Could not load file or assembly 'EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

App.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2"/>
  </startup>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v13.0"/>
      </parameters>
    </defaultConnectionFactory>
  </entityFramework>
</configuration>

packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="AutoMapper" version="9.0.0" targetFramework="net462" />
  <package id="EntityFramework" version="5.0.0" targetFramework="net462" />
</packages>

I tried to uninstall and re install EF do all the Solution hear and i can't change target framework to 5 because i use automaper

What version of .net? I see you've installed it for 4.6.2 but what are you using? — Train

Train Train · Accepted Answer · 2020-01-17T17:58:34

Check a couple of things.

Make sure the version of EF installed supports the version of .Net you're using.
uninstall and reinstall
Make sure Nuget installed EntityFramework package
Make sure that all the projects are targeting the same .NET Framework.

EDIT:

Check your refrences for every EntityFramework.dll Go and check the version for each one.

: System.IO.FileLoadException: Could not load file or assembly 'EntityFramework'

2 Answers