title: Dynamically add roles to authorize attribute for controller in ASP.NET 5
body: <p>I have a sample question with this post <a href="https://stackoverflow.com/questions/30099613/dynamically-add-roles-to-authorize-attribute-for-controller">Dynamically add roles to authorize attribute for controller</a> but for ASP.NET 5 (vNext)
  In ASP.NET 5, I can not overwrite AuthorizeAttribute class as above post said. So how can I add roles dynamically Controllers in ASP.NET 5 (vNext)</p>
  
  <p>Thanks in advance.</p>