Could not load file or assembly ‘System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’

When creating a new MVC5 application using VS2013 I got the following error:

Could not load file or assembly ‘System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The located assembly’s manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

I tried the following, to no avail:

  • Updated the MVC 5 package (Nuget)
  • Uninstalled / installed MVC5 (Nuget)
  • Reviewed, then removed binding redirects in the web.config
  • Repaired VS2013 installation
  • Installed VS2013.4

What did help was:

Install-Package Microsoft.AspNet.WebApi

After this my MVC5 Application was running flawless.

About Gaston

MCT, MCSD, MCDBA, MCSE, MS Specialist
This entry was posted in .Net, Development, MVC, MVC5, Web API. Bookmark the permalink.

2 Responses to Could not load file or assembly ‘System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’

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