绑定重定向不重定向？

Question

I've run into an issue where I'm getting an error about something trying to load an old version of a dll that is no longer even on the machine.

Could not load file or assembly 'Newtonsoft.Json, Version=6.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

I already had a redirect in the webconfig to deal with this:

<dependentAssembly>
  <assemblyIdentity name="NewtonSoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
  <bindingRedirect oldVersion="0.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
</dependentAssembly>

There are no references to the 6.0.0.0 build in the solution. A dependency perhaps? If so I have no idea how to get the run time to tell me who the guilty part is.

Why is this still faulting?

Answer 1

Turns out the answer was right in front of me. The assemblyBinding tag has an appliesTo attribute that specifies which versions should be redirected per .Net framework version.

assemblyBinding appliesTo="v2.0.50727"

For some reason it was set to v2.0 - the application is running v4.0 so the redirects where not applying. Removing the attribute corrects the issue.

<runtime>
    <assemblyBinding>
        <dependentAssembly>
            <assemblyIdentity name="NewtonSoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
            <bindingRedirect oldVersion="0.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
</runtime>