Windows update caused MVC3 and MVC4 stop working

Question

am i the only one who installed a Windows Update (8.1) on october 15, and suddenly MVC stop working because of this warning?

Warning 1 Could not resolve this reference. Could not locate the assembly "System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors.

It seems that this windows update installs a newer version of MVC with version number 4.0.0.1, and removes old version from program files folder.

Someone know how to fix this without crawling for each project?

Answer 1

The best solution is update DLL to version 4.0.0.1. Try use nuget:

Install-Package Microsoft.AspNet.Mvc -Version 4.0.40804 -Project <your project name>

This will automatically update

  <dependentAssembly>
    <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
    <bindingRedirect oldVersion="0.0.0.0-4.0.0.1" newVersion="4.0.0.1" />
  </dependentAssembly>

You just have to edit version System.Web.Mvc manually in:

<compilation debug="true" targetFramework="4.0">
  <assemblies>
    <add assembly="System.Web.Mvc, Version=4.0.0.1, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />