title: System.Net.Http version conflict causing build warning
body: <p>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.</p>
  
  <p><strong>What is the best way around this? Is the package Microsoft.Net.Http.2.0.20710.0 outdated, should I just reference System.Net.Http, Version=4.0.0.0 manually in my project?</strong></p>
  
  <p>The build output is:</p>
  
  <pre class="lang-none prettyprint-override"><code>  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:\Working\MyProject\packages\Microsoft.Net.Http.2.0.20710.0\lib\net40\System.Net.Http.dll].
            C:\Working\MyProject\packages\Microsoft.Net.Http.2.0.20710.0\lib\net40\System.Net.Http.dll
              Project file item includes which caused reference "C:\Working\MyProject\packages\Microsoft.Net.Http.2.0.20710.0\lib\net40\System.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 Assemblies\Microsoft\Framework\.NETFramework\v4.5\System.Net.Http.dll].
            C:\Working\MyProject\packages\Microsoft.AspNet.WebApi.Core.4.0.20710.0\lib\net40\System.Web.Http.dll
              Project file item includes which caused reference "C:\Working\MyProject\packages\Microsoft.AspNet.WebApi.Core.4.0.20710.0\lib\net40\System.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:\Working\MyProject\packages\Microsoft.AspNet.WebApi.Client.4.0.20710.0\lib\net40\System.Net.Http.Formatting.dll
              Project file item includes which caused reference "C:\Working\MyProject\packages\Microsoft.AspNet.WebApi.Client.4.0.20710.0\lib\net40\System.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:\Working\MyProject\packages\Microsoft.AspNet.WebApi.WebHost.4.0.20710.0\lib\net40\System.Web.Http.WebHost.dll
              Project file item includes which caused reference "C:\Working\MyProject\packages\Microsoft.AspNet.WebApi.WebHost.4.0.20710.0\lib\net40\System.Web.Http.WebHost.dll".
                System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(1578,5): warning MSB3247: Found conflicts between different versions of the same dependent assembly.
  </code></pre>