title: Build VS 2015 extension on build server without VS installed?
body: <p>Is it possible to build a Visual Studio 2015 extension project on a build server (TeamCity agent) without Visual Studio installed? What kind of SDK do we need to install?</p>
  
  <p>At the moment we receive the following error message:</p>
  
  <blockquote>
    <p>error MSB4019: The imported project "C:\Program Files (x86)\MSBuild\Microsoft\Portable\v4.6\Microsoft.Portable.CSharp.targets" was not found. Confirm that the path in the  declaration is correct, and that the file exists on disk.</p>
  </blockquote>
  
  <p>So there is definitely some kind of SDK missing.</p>