title: Swashbuckle Swagger - How to annotate content types?
body: <p>How do I annotate my ASP.NET WebAPI actions so that the swagger metadata includes the content-types that my resources support?</p>
  
  <p>Specifically, I want the documentation to show that one of my resources can return the 'original' <code>application/json</code> and <code>application/xml</code> but also now returns a new format, <code>application/vnd.blah+json</code> or <code>+xml</code>.</p>