title: Unable to install nuget package Microsoft.AspNet.Identity.Owin -Version 2.1.0
body: <p>I'm a newbie and creating an ASP.Net empty web application (C#) project. But I got this error when installing nuget package Microsoft.AspNet.Identity.Owin -Version 2.1.0.
  I don't know what's seemed to be the problem bcoz I'm using the newer version VS 2012 .Net Framework 4.5 and not VS 2010.
  Tried install and uninstalling nuget packages but to no avail.</p>
  
  <pre><code>Error result:
  Error loading type library/DLL. (Exception from HRESULT: 0x80029C4A (TYPE_E_CANTLOADLIBRARY))
  Uninstalling 'Microsoft.AspNet.Identity.Core 2.1.0'.
  Successfully uninstalled 'Microsoft.AspNet.Identity.Core 2.1.0'.
  Install failed. Rolling back...
  Install-Package : Failed to add reference to 'Microsoft.AspNet.Identity.Core'.
  At line:1 char:16
  + Install-Package &lt;&lt;&lt;&lt;  Microsoft.AspNet.Identity.Owin -Version 2.1.0
      + CategoryInfo          : NotSpecified: (:) [Install-Package], InvalidOperationException
      + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PowerShell.Commands.InstallPackageCommand
  </code></pre>
  
  <p>What's seemed to be the problem?</p>
  
  <p>N.B: For reasons unknown, I had the same problem with installing nuget Package EntityFramework Version 6.1.1 but managed to resolve it by adding package.config file to the project. 
  Many thanks indeed.</p>