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  1. POProblems related to Microsoft HTTP Client Libraries v2.1.10 NuGet update
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    <p>Note: This question was totally rewritten several days after it was originally posted.</p> <p>I have an ASP.NET MVC app developed in VS 2012, deployed to Azure. The original projects were created from the ASP.NET MVC 4 project template.</p> <p>NuGet recently started showing a whole slew of updated packages from Microsoft. One of those updates, <strong>Microsoft HTTP Client Libraries v2.1.10</strong>, causes serious problems when it is installed.</p> <ol> <li><p>It installs MicrosoftBcl.Build, which is not compatible with my Azure project (see <a href="https://stackoverflow.com/questions/17180268/warning-all-projects-referencing-myproject-csproj-must-install-nuget-package-m">this SO question</a> for the problem and its solution).</p></li> <li><p>It causes a whole slew of "incompatible DLL" problems (see below).</p></li> </ol> <p>This raises several burning questions:</p> <ol> <li><p>My MVC app is just a website. It just runs in a web browser. Do I need this package at all? (E.g., is it used by template code, which would break, possibly subtly, if I remove the package?)</p></li> <li><p>According to the Project Site (<a href="http://blogs.msdn.com/b/bclteam/p/httpclient.aspx" rel="nofollow noreferrer">http://blogs.msdn.com/b/bclteam/p/httpclient.aspx</a>), there are a couple of newer (albeit beta) versions of this product. I assume I'd see them if I told NuGet to show me non-released versions. Do these versions fix the problems described above?</p></li> </ol> <p>Here are the warnings I get when I build the solution after installing the updated NuGet package...</p> <pre><code>1&gt;------ Build started: Project: Ruby, Configuration: Release Any CPU ------ 1&gt; All packages listed in packages.config are already installed. 1&gt; No way to resolve conflict between "System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" and "System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35". Choosing "System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" arbitrarily. 1&gt; Consider app.config remapping of assembly "DotNetOpenAuth.AspNet, Culture=neutral, PublicKeyToken=2780ccd10d57b246" from Version "4.0.0.0" [] to Version "4.3.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\DotNetOpenAuth.AspNet.4.3.0.13117\lib\net45-full\DotNetOpenAuth.AspNet.dll] to solve conflict and get rid of warning. 1&gt; Consider app.config remapping of assembly "System.Web.Mvc, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "3.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET MVC 3\Assemblies\System.Web.Mvc.dll] to Version "4.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.Mvc.4.0.30506.0\lib\net40\System.Web.Mvc.dll] to solve conflict and get rid of warning. 1&gt; Consider app.config remapping of assembly "System.Web.Razor, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.Razor.dll] to Version "2.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.Razor.2.0.30506.0\lib\net40\System.Web.Razor.dll] to solve conflict and get rid of warning. 1&gt; Consider app.config remapping of assembly "WebGrease, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [] to Version "1.3.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\WebGrease.1.3.0\lib\WebGrease.dll] to solve conflict and get rid of warning. 1&gt; Consider app.config remapping of assembly "System.Web.WebPages.Razor, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.WebPages.Razor.dll] to Version "2.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.WebPages.2.0.30506.0\lib\net40\System.Web.WebPages.Razor.dll] to solve conflict and get rid of warning. 1&gt; Consider app.config remapping of assembly "Microsoft.Data.OData, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "5.2.0.0" [] to Version "5.5.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.Data.OData.5.5.0\lib\net40\Microsoft.Data.OData.dll] to solve conflict and get rid of warning. 1&gt; Consider app.config remapping of assembly "System.Web.WebPages, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.WebPages.dll] to Version "2.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.WebPages.2.0.30506.0\lib\net40\System.Web.WebPages.dll] to solve conflict and get rid of warning. 1&gt; Consider app.config remapping of assembly "DotNetOpenAuth.Core, Culture=neutral, PublicKeyToken=2780ccd10d57b246" from Version "4.0.0.0" [] to Version "4.3.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\DotNetOpenAuth.Core.4.3.0.13117\lib\net45-full\DotNetOpenAuth.Core.dll] to solve conflict and get rid of warning. 1&gt; Consider app.config remapping of assembly "System.Web.WebPages.Deployment, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.WebPages.Deployment.dll] to Version "2.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.WebPages.2.0.30506.0\lib\net40\System.Web.WebPages.Deployment.dll] to solve conflict and get rid of warning. 1&gt;C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(1605,5): warning MSB3247: Found conflicts between different versions of the same dependent assembly. 1&gt; Ruby -&gt; C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\Ruby\bin\Ruby.dll 2&gt;------ Build started: Project: Ruby.Azure, Configuration: Release Any CPU ------ 3&gt;------ Publish started: Project: Ruby.Azure, Configuration: Release Any CPU ------ 3&gt;C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.Bcl.Build.1.0.7\tools\Microsoft.Bcl.Build.targets(220,5): warning : All projects referencing Ruby.csproj must install nuget package Microsoft.Bcl.Build. 3&gt; No way to resolve conflict between "System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" and "System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35". Choosing "System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" arbitrarily. 3&gt; Consider app.config remapping of assembly "DotNetOpenAuth.AspNet, Culture=neutral, PublicKeyToken=2780ccd10d57b246" from Version "4.0.0.0" [] to Version "4.3.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\DotNetOpenAuth.AspNet.4.3.0.13117\lib\net45-full\DotNetOpenAuth.AspNet.dll] to solve conflict and get rid of warning. 3&gt; Consider app.config remapping of assembly "System.Web.Mvc, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "3.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET MVC 3\Assemblies\System.Web.Mvc.dll] to Version "4.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.Mvc.4.0.30506.0\lib\net40\System.Web.Mvc.dll] to solve conflict and get rid of warning. 3&gt; Consider app.config remapping of assembly "System.Web.Razor, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.Razor.dll] to Version "2.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.Razor.2.0.30506.0\lib\net40\System.Web.Razor.dll] to solve conflict and get rid of warning. 3&gt; Consider app.config remapping of assembly "WebGrease, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [] to Version "1.3.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\WebGrease.1.3.0\lib\WebGrease.dll] to solve conflict and get rid of warning. 3&gt; Consider app.config remapping of assembly "System.Web.WebPages.Razor, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.WebPages.Razor.dll] to Version "2.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.WebPages.2.0.30506.0\lib\net40\System.Web.WebPages.Razor.dll] to solve conflict and get rid of warning. 3&gt; Consider app.config remapping of assembly "Microsoft.Data.OData, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "5.2.0.0" [] to Version "5.5.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.Data.OData.5.5.0\lib\net40\Microsoft.Data.OData.dll] to solve conflict and get rid of warning. 3&gt; Consider app.config remapping of assembly "System.Web.WebPages, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.WebPages.dll] to Version "2.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.WebPages.2.0.30506.0\lib\net40\System.Web.WebPages.dll] to solve conflict and get rid of warning. 3&gt; Consider app.config remapping of assembly "DotNetOpenAuth.Core, Culture=neutral, PublicKeyToken=2780ccd10d57b246" from Version "4.0.0.0" [] to Version "4.3.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\DotNetOpenAuth.Core.4.3.0.13117\lib\net45-full\DotNetOpenAuth.Core.dll] to solve conflict and get rid of warning. 3&gt; Consider app.config remapping of assembly "System.Web.WebPages.Deployment, Culture=neutral, PublicKeyToken=31bf3856ad364e35" from Version "1.0.0.0" [C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.WebPages.Deployment.dll] to Version "2.0.0.0" [C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\packages\Microsoft.AspNet.WebPages.2.0.30506.0\lib\net40\System.Web.WebPages.Deployment.dll] to solve conflict and get rid of warning. 3&gt;C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(1605,5): warning MSB3247: Found conflicts between different versions of the same dependent assembly. 3&gt; Transformed Web.config using C:\Users\Robert\Documents\SBSoftware\SCM\Ruby\Ruby\Web.Release.config into obj\Release\TransformWebConfig\transformed\Web.config. 3&gt;Ruby(0,0): warning WAT153: The web project 'Ruby' is dependent on the following MVC assembly: C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET MVC 3\Assemblies\System.Web.Mvc.dll. MVC assemblies must be added to the package or installed on the virtual machine for your web role. For more details about this, see the following help page: http://go.microsoft.com/fwlink/?LinkId=218227. 3&gt;Ruby(0,0): warning WAT153: The web project 'Ruby' is dependent on the following MVC assembly: C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.Razor.dll. MVC assemblies must be added to the package or installed on the virtual machine for your web role. For more details about this, see the following help page: http://go.microsoft.com/fwlink/?LinkId=218227. 3&gt;Ruby(0,0): warning WAT153: The web project 'Ruby' is dependent on the following MVC assembly: C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.WebPages.Razor.dll. MVC assemblies must be added to the package or installed on the virtual machine for your web role. For more details about this, see the following help page: http://go.microsoft.com/fwlink/?LinkId=218227. 3&gt;Ruby(0,0): warning WAT153: The web project 'Ruby' is dependent on the following MVC assembly: C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.WebPages.dll. MVC assemblies must be added to the package or installed on the virtual machine for your web role. For more details about this, see the following help page: http://go.microsoft.com/fwlink/?LinkId=218227. 3&gt;Ruby(0,0): warning WAT153: The web project 'Ruby' is dependent on the following MVC assembly: C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies\System.Web.WebPages.Deployment.dll. MVC assemblies must be added to the package or installed on the virtual machine for your web role. For more details about this, see the following help page: http://go.microsoft.com/fwlink/?LinkId=218227. </code></pre>
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