title: NuGet references, VS2015 and VS2013 compatibility
body: <p>We're just dipping our toes into the VS 2015 water. Our references to internal NuGet packages seemed to be a pickle so I forced a reinstall on one particular package.</p>
  
  <p>It reinstalled it, and all its dependencies, for the whole solution. Afterwards, the <code>.csproj</code> files are missing their traditional references.</p>
  
  <p>For example, this block/element existed in the project file before I updated:</p>
  
  <pre><code>&lt;Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL"&gt;
    &lt;HintPath&gt;..\..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll&lt;/HintPath&gt;
    &lt;Private&gt;True&lt;/Private&gt;
  &lt;/Reference&gt;
  </code></pre>
  
  <p>My guess is that this is new behaviour, that now all references are NuGet packages. I actually thought this was only for new ASP.NET projects, these are old ASP.NET projects, so I didn't expect this new behaviour (if that's what it is).</p>
  
  <p>Is this new behaviour? Will all the team now have to move to VS 2015 because the refs will be missing if I commit these changes and they open it in 2013?</p>
  
  <p>Thanks</p>
  
  <p>Update: No response (Christmas) so x-posted at GitHub</p>
  
  <p><a href="https://github.com/NuGet/Home/issues/1866" rel="nofollow">https://github.com/NuGet/Home/issues/1866</a></p>