System.Net.Http 版本冲突导致构建警告

System.Net.Http version conflict causing build warning(System.Net.Http 版本冲突导致构建警告)

问题描述

nuget 包 Microsoft.Net.Http.2.0.20710.0 导致我发出构建警告，因为它使用 System.Net.Http, Version=2.0.0.0 与来自另一个包的版本 4 发生冲突.

The nuget package Microsoft.Net.Http.2.0.20710.0 is causing me a build warning because of its use of System.Net.Http, Version=2.0.0.0 which is fighting with version 4 coming from another package.

解决这个问题的最佳方法是什么?Microsoft.Net.Http.2.0.20710.0 包是否已过时，我应该在我的项目中手动引用 System.Net.Http, Version=4.0.0.0 吗?

构建输出是:

  There was a conflict between "System.Net.Http, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" and "System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a".
      "System.Net.Http, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" was chosen because it was primary and "System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" was not.
      References which depend on "System.Net.Http, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" [C:WorkingMyProjectpackagesMicrosoft.Net.Http.2.0.20710.0lib
et40System.Net.Http.dll].
          C:WorkingMyProjectpackagesMicrosoft.Net.Http.2.0.20710.0lib
et40System.Net.Http.dll
            Project file item includes which caused reference "C:WorkingMyProjectpackagesMicrosoft.Net.Http.2.0.20710.0lib
et40System.Net.Http.dll".
              System.Net.Http, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL
      References which depend on "System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" [C:Program Files (x86)Reference AssembliesMicrosoftFramework.NETFrameworkv4.5System.Net.Http.dll].
          C:WorkingMyProjectpackagesMicrosoft.AspNet.WebApi.Core.4.0.20710.0lib
et40System.Web.Http.dll
            Project file item includes which caused reference "C:WorkingMyProjectpackagesMicrosoft.AspNet.WebApi.Core.4.0.20710.0lib
et40System.Web.Http.dll".
              System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL
              System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL
          C:WorkingMyProjectpackagesMicrosoft.AspNet.WebApi.Client.4.0.20710.0lib
et40System.Net.Http.Formatting.dll
            Project file item includes which caused reference "C:WorkingMyProjectpackagesMicrosoft.AspNet.WebApi.Client.4.0.20710.0lib
et40System.Net.Http.Formatting.dll".
              System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL
              System.Net.Http.Formatting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL
              System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL
          C:WorkingMyProjectpackagesMicrosoft.AspNet.WebApi.WebHost.4.0.20710.0lib
et40System.Web.Http.WebHost.dll
            Project file item includes which caused reference "C:WorkingMyProjectpackagesMicrosoft.AspNet.WebApi.WebHost.4.0.20710.0lib
et40System.Web.Http.WebHost.dll".
              System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL
C:WindowsMicrosoft.NETFrameworkv4.0.30319Microsoft.Common.targets(1578,5): warning MSB3247: Found conflicts between different versions of the same dependent assembly.

推荐答案

您可以尝试 此 Microsoft Connect 错误报告.

或者您可以尝试在您的 Web.config 中添加类似的内容:

Or you can try and add something like this to your Web.config:

  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" />
        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>

这是 Connect Bug 中的解决方法:

This is the workaround in the Connect Bug:

修改.......: <Reference Include="System.Net.Http">
阅读......:<Reference Include="System.Net.Http, Version=4.0.0.0">

modify.......: <Reference Include="System.Net.Http">
to read ......: <Reference Include="System.Net.Http, Version=4.0.0.0">

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