title: Missing .NETCore v4.5.1
body: <p>I have Windows 8.1 Home machine with Visual Studio Express 2013 Update 2 and Windows 8.1 SDK installed. I am trying to build an application against .NETCore 4.5.1 libraries, but I'm getting lot of compiler errors just like this:</p>
  
  <pre><code>error CS0006: Metadata file 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5.1\System.Collections.Concurrent.dll' could not be found
  </code></pre>
  
  <p>The reason is that in c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETCore\ there is only v4.5 directory.</p>
  
  <p>I've tried to install .NET Framework 4.5.1 and update my Visual Studio to the newest version. I've also tried to google where I can get this specific (or any) version of .NETCore but with no luck.</p>
  
  <p>On my friend's machine this directory exists, but we cannot tell what he have installed to get it in the first place.</p>
  
  <p>Thanks!</p>