Could not load file or assembly 'WebMatrix.Data`

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I updated MVC4 to MVC5. When you run the application I got an error that I don't have WebMatrix.Data. I installed it PM> Install-Package WebMatrix.Data. Now when you start getting in the browser:

Could not load file or assembly 'WebMatrix.Data, Version = 3.0.0.0, Culture = neutral, PublicKeyToken = 31bf3856ad364e35' or one of its dependencies. Located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Anyone know how to fix this?

Package Manager Console Log

Attempting to resolve dependency 'Microsoft.AspNet.WebPages.Data (≥ 2.0.20710.0)'.
Installing 'WebMatrix.Data 2.0.30506.0'.
You are downloading WebMatrix.Data from Microsoft, the license agreement to which is available at http://www.microsoft.com/web/webpi/eula/aspnetcomponent_rtw_enu.htm. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed 'WebMatrix.Data 2.0.30506.0'.
Adding 'WebMatrix.Data 2.0.30506.0' to xxx.
Successfully added 'WebMatrix.Data 2.0.30506.0' to xxx.`

Piece of code Web.config

<runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.3.0.0" newVersion="1.3.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="EntityFramework" publicKeyToken="b77a5c561934e089" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="DotNetOpenAuth.AspNet" publicKeyToken="2780ccd10d57b246" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-4.3.0.0" newVersion="4.3.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="DotNetOpenAuth.Core" publicKeyToken="2780ccd10d57b246" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-4.3.0.0" newVersion="4.3.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.AspNet.Identity.Core" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Razor" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages.Razor" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebMatrix.WebData" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebMatrix.Data" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
c#
asp.net-mvc
asp.net-mvc-4
asp.net-mvc-5
web-config
asked on Stack Overflow Jun 25, 2014 by user3128303

6 Answers

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Go into: Tools > NuGet Package Manager > Package Manager Console

And run the following command:

PM> Install-Package Microsoft.AspNet.WebPages.Data
answered on Stack Overflow Aug 20, 2014 by VINICIUS SIN • edited Dec 2, 2015 by Maxime Rouiller
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This is what worked for me. Took weeks to figure it out.

Make sure your target framework to what you want it to be (I had 4.6.1).

Go into: Tools > NuGet Package Manager > Package Manager Console and do the following commands.

Uninstall-Package Microsoft.AspNet.WebHelpers
Uninstall-Package Microsoft.AspNet.WebPages.OAuth
Uninstall-Package Microsoft.AspNet.WebPages.WebData
Uninstall-Package Microsoft.AspNet.WebPages.Data

Install-Package Microsoft.AspNet.WebPages.Data
Install-Package Microsoft.AspNet.WebPages.WebData
Install-Package Microsoft.AspNet.WebPages.OAuth
Install-Package Microsoft.AspNet.WebHelpers

Hope this helps anyone that tried the other solutions with no luck.

answered on Stack Overflow Jan 9, 2017 by Blue Eyed Behemoth
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This is actually a legacy library. You should instead install Microsoft.AspNet.WebPages.Data if you are upgrading from MVC 4 to 5.

PM> Install-Package Microsoft.AspNet.WebPages.Data
answered on Stack Overflow Oct 21, 2015 by Yodacheese
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This works as well

Update-Package Microsoft.AspNet.WebPages.Data
answered on Stack Overflow Aug 19, 2016 by Sergiy Lichenko
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from your package manager console I can see that your project has Successfully added 'WebMatrix.Data 2.0.30506.0' to xxx.`

So get your web.config in sync with WebMatrix.Data 2.0.30506.0

answered on Stack Overflow Mar 8, 2017 by Shadab Ahmed
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Installing MVC 4 (not the runtime but the full version) fixed it for me.

answered on Stack Overflow Sep 5, 2019 by twasbrillig

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