Binding redirect ignored

Question

My website gives...

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)

... and yet in web.config, I have...

<runtime xmlns="">
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Http" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>

The version of System.Web.Http referenced by the project is 5.2.3.0.

I think I added this redirect before to fix this exact issue, but now it's not working. Any ideas?

Contents of packages.config...

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="AspNetMvc" version="4.0.20710.0" targetFramework="net4" />
  <package id="CommonServiceLocator" version="1.3" targetFramework="net461" />
  <package id="JsonValue" version="0.6.0" targetFramework="net4" />
  <package id="Microsoft.AspNet.Mvc" version="4.0.30506.0" targetFramework="net461" />
  <package id="Microsoft.AspNet.Razor" version="2.0.20715.0" targetFramework="net4" />
  <package id="Microsoft.AspNet.WebApi" version="5.2.3" targetFramework="net461" />
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net461" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net461" />
  <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.3" targetFramework="net461" />
  <package id="Microsoft.AspNet.WebPages" version="2.0.20710.0" targetFramework="net4" />
  <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net4" />
  <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net461" />
  <package id="Unity" version="4.0.1" targetFramework="net461" />
  <package id="Unity.Mvc4" version="1.6.0.0" targetFramework="net461" />
  <package id="Unity.WebAPI" version="5.2.3" targetFramework="net461" />
</packages>

I am not sure, but I guess MVC 4.0.0 and WebApi 5.2.3 are not compatible next to each other. I would try to downgrade WebApi or upgrade MVC. — dropoutcoder, Dec 28 '17 at 15:35
Possible duplicate of [HRESULT: 0x80131040: The located assembly's manifest definition does not match the assembly reference](https://stackoverflow.com/questions/93879/hresult-0x80131040-the-located-assemblys-manifest-definition-does-not-match-t) — Renan Araújo, Dec 28 '17 at 15:35
It's likely that you have a dependency on an assembly that has a dependency on MVC 4.0.0, probably `Unity.Mvc4`. Try removing that assembly and see if the error persists, or replace it with the `Unity.Mvc` package. — , Dec 28 '17 at 15:40
or you are missing some binding redirects `PM> Get-Project –All | Add-BindingRedirect` — dropoutcoder, Dec 28 '17 at 15:43
@cloudikka MVC 4.0.0 and WebApi 5.2.3 are apparently running in production together. — Ian Warburton, Dec 28 '17 at 15:48
@IanWarburton: I said am not sure about those versions. It was just a pointer. — dropoutcoder, Dec 28 '17 at 15:50
@IanWarburton It is powershell command. you can check it [here](https://learn.microsoft.com/en-us/nuget/tools/ps-ref-add-bindingredirect) — dropoutcoder, Dec 28 '17 at 15:51
@cloudikka Yes, I appreciate your help. I was merely clarifying. — Ian Warburton, Dec 28 '17 at 15:57

score 0 · Accepted Answer · answered Dec 28 '17 at 23:43

0

Many hours later I discovered that this error only appears on my default route and only on my dev machine. It was probably doing it all along and I assumed that something had changed after I re-checked out the code.

What is a word for this?

answered Dec 28 '17 at 23:43

Ian Warburton

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Binding redirect ignored

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