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Asked: 2026-06-13T00:19:01+00:00

this problem is exactly the same as this post http://forums.asp.net/t/1807797.aspx/1?System+Net+Http+is+not+found and this one on

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this problem is exactly the same as this post http://forums.asp.net/t/1807797.aspx/1?System+Net+Http+is+not+found and this one on StackOverflow

I have all the latest RTM bits, Started a new MVC 4 in .Net 4.5, added the WebAPI nuget package and now my code analysis fails with the same error as reported in the above link.

CA0058 Error Running Code Analysis CA0058 : The referenced assembly ‘System.Net.Http, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ could not be found. This assembly is required for analysis and was referenced by: C:\Projects\InHouse\TimeRecorder\StopGap\TimeRec\bin\TimeRec.dll, C:\Projects\InHouse\TimeRecorder\StopGap\packages\Microsoft.AspNet.WebApi.Core.4.0.20710.0\lib\net40\System.Web.Http.dll. [Errors and Warnings] – (Global)

From what I can find this seemed to happen with the RC versions because there was a conflict between the .NET 4.5 framework System.Net.Http and the WebApi’s version of the System.Net.Http.

The other answers on the StackOverflow response talk about downgrading from .Net 4.5 to 4.0, for obvious reasons, this is not my preferred solution!

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1 Answer

  1. Editorial Team

    Try the following:

    1. Depending on your Visual Studio edition navigate to:
      • VS 2010:
        %ProgramFiles(x86)%\Microsoft Visual Studio 10.0\Team Tools\Static Analysis Tools\FxCop
      • VS 2012:
        %ProgramFiles(x86)%\Microsoft Visual Studio 11.0\Team Tools\Static Analysis Tools\FxCop
    2. Open FxCopCmd.exe.config and change AssemblyReferenceResolveMode
      from StrongName to StrongNameIgnoringVersion.
    3. Save the change and rebuild your project.
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