I am trying to use Autofac.WebApi with an ASP.NET MVC4 WebApi project. I installed the latest Autofac and Autofac.WebApi using Nuget, but at runtime on application start when trying to register the GlobalConfiguration DependencyResolver, I get this exception thrown:

> 
> Could not load file or assembly 'Autofac, Version=2.6.2.859,
>  Culture=neutral, PublicKeyToken=17863af14b0044da' or one of its
>  dependencies. The located assembly's manifest definition does not
>  match the assembly reference. (Exception from HRESULT: 0x80131040)
> 
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