Could not load file or assembly 'System.Web.Http, Version=5.2.2.0

Question

I added the Odata v4 package to my API, I noticed that it updated my Microsoft.AspNet.WebApi package to 5.2.3 version. But when i try to use

odata builder configuation in my WebApiConfig it showing error like 'Could not load file or assembly 'System.Web.Http, Version=5.2.2.0'.

config.MapODataServiceRoute("odata", null, GetEdmModel(), new DefaultODataBatchHandler(GlobalConfiguration.DefaultServer));

I searched this version(5.2.2) in my project but every thing is 5.2.3 and I updated all the packages too to solve this issue but failed. Copy to Local property also true for System.Web.Http dll.
Any idea?

Check your web.config. There might still be an assembly redirect in there redirecting all references to version 5.2.2.0. — HaukurHaf
– HaukurHaf, Commented Jul 3, 2015 at 12:42
Thanks, there is nothing I found in web.config, This error is occuring when I add config.MapODataServiceRoute("odata", null, GetEdmModel(), new DefaultODataBatchHandler(GlobalConfiguration.DefaultServer)); in the webApiconfig — Linoy
– Linoy, Commented Jul 5, 2015 at 4:22
I have the exact same problem, did you ever find a solution for this? — Oberheim
– Oberheim, Commented Aug 28, 2015 at 13:44

Linoy · Accepted Answer · 2015-08-29 15:03:46Z

13

Visual studio solved this for me. The version conflicts are shown as warning and when I clicked it automatically added the binding redirect to my web config.

https://msdn.microsoft.com/en-us/library/2fc472t2.aspx

The binding redirect that solved my issue is,

<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.Net.Http.Formatting" publicKeyToken="31BF3856AD364E35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </dependentAssembly>
</assemblyBinding>

edited Aug 29, 2015 at 15:03

answered Jul 5, 2015 at 4:35

Linoy

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1 Comment

JonathanPeel Over a year ago

I also have this in web.config, but I still get: "Could not load file or assembly 'System.Web.Http, Version=5.2.2.0"

Yann Olaf · Accepted Answer · 2015-10-30 19:06:09Z

0

Well this is not "real" solution but a workaround: I have changed the machine.config and replaced <runtime /> with

  <runtime>
      <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>
      </assemblyBinding>
    </runtime>

so I works but if you have other web sites running...

edited Oct 30, 2015 at 19:06

answered Oct 30, 2015 at 18:59

Yann Olaf

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