title: Mono project System.dll conflict with Microsoft.Owin
body: <p>Microsoft.Owin seems to be loading the 2.0.0.0 version of System.dll along-side the 4.0.0.0 System.dll which is causing an issue in which a cast is failing because a System.Security.Claims.ClaimsPrincipal from System.dll is being cast to a System.Security.Claims.ClaimsPrincipal from System.dll 4.0.0.0</p>
  
  <p>How can I force the mono project to only load the 4.0.0.0 System.dll?</p>
  
  <p>This applies to Mono 3.6</p>