FileLoadException after NuGet update for System.Web.Http

Question

I just updated my installed projects from NuGet and got the unhandled exception below at runtime:

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)

The exception was thrown from NinjectWebCommon. The bootstraper.Initialize(CreateKernel); line of code was the offender.

 public static void Start()
 {
     DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
     DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
     bootstrapper.Initialize(CreateKernel);
 }

I assume that Ninject may have a dependency on the old version of System.Web.Http, but don't want to rollback if I don't have to.

Has anyone had this problem and solved it?

EDIT

It seems as though the offending code is inside the bootstrapper.Initialize() method:

private static IKernel CreateKernel()
{
    var kernel = new StandardKernel();
    kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
    kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();

    RegisterServices(kernel);

    // Set Web API Resolver (using WebApiContrib.Ioc.Ninject)
    GlobalConfiguration.Configuration.DependencyResolver = new NinjectResolver(kernel);

    return kernel;
}

When I commented out the line of code under the existing comment the project ran fine. Will need to figure out how to get WebApi to work without WebApiContrub.IoC.Ninject...

were you able to solve this? I'm not getting the exception anymore after suggested solution, but DI not working... — developer82

Remo Gloor Remo Gloor · Accepted Answer · 2013-10-29T11:47:58

Sounds like you are using Web API2 without assembly binding redirect

<dependentAssembly>
    <assemblyIdentity name="System.Web.Http" publicKeyToken="31bf3856ad364e35" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
</dependentAssembly>

FileLoadException after NuGet update for System.Web.Http

1 Answers