title: Ambiguous reference issue (Microsoft.AspNet.Identity & Microsoft.AspNet.Identity.Core)
body: <p>I'm building an AngularJS Single-Page App using the latest VS2015 Community and ASP.NET 5 etc...</p>
  
  <p>The problem I'm now having while trying to implement an Authentication is that I need to use these two Namespaces:</p>
  
  <pre><code>Microsoft.AspNet.Identity //Version 3.0.0-beta4
  Microsoft.AspNet.Identity.Owin //Version 2.2.1
  </code></pre>
  
  <p>but since Microsoft.AspNet.Identity.Owin has a dependency with   </p>
  
  <pre><code>Microsoft.AspNet.Identity.Core 
  </code></pre>
  
  <p>I keep getting ambiguous reference issues, for example for UserManager which exists in both Microsoft.AspNet.Identity and Microsoft.AspNet.Identity.Core .</p>
  
  <p>Has anyone else dealt with this before? 
  Is it a version incompatibility issue or just the not complete Owin ASP.NET 5 implementation?</p>