title: How do I get System.Web.Http.Owin?
body: <p>I had a version number problem with system.web.http.owin.</p>
  
  <p>So I removed it from my projects package references, with the idea that I would re-added it to see if it fixed the problem. However it has disappeared completely. I.e. in visual studio if I go: </p>
  
  <p>solution explorer > myProject > references > RMC > add reference > </p>
  
  <p>and then search for <code>system.web.http.owin</code> it doesn't appear.</p>
  
  <p>Any ideas what has gone wrong or what package I need to install to make it re-appear.</p>
  
  <p>My original error message...</p>
  
  <blockquote>
    <p>Error 7   Assembly 'System.Web.Http.Owin, Version=5.1.0.0,
    Culture=neutral, PublicKeyToken=31bf3856ad364e35' uses
    'System.Web.Http, Version=5.1.0.0, Culture=neutral,
    PublicKeyToken=31bf3856ad364e35' which has a higher version than
    referenced assembly 'System.Web.Http, Version=4.0.0.0,
    Culture=neutral,
    PublicKeyToken=31bf3856ad364e35'  e:\user\project1\src\packages\Microsoft.AspNet.WebApi.Owin.5.1.1\lib\net45\System.Web.Http.Owin.dll Smots.Core</p>
  </blockquote>