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Editorial Team
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Asked: 2026-06-03T07:02:57+00:00

I’m using the ASP.NET Web API in my site. When I add it to

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I’m using the ASP.NET Web API in my site. When I add it to my Rackspace cloud site, the assemblies in my web.config aren’t recognized. I’m getting configuration errors, such as:

Could not load file or assembly ‘System.Json, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The system cannot find the file specified.

Rackspace Support says I need to add the dll files. Does this mean they don’t support ASP.NET Web API? Is it possible to add the dll files myself? If yes, where do I get them from?

TIA

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1 Answer

  1. Editorial Team

    I was able to get this working by copying the DLL files from my C:\Program Files\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies folder.

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