title: Ignore ValidateAntiForgeryToken only for specific action
body: <p>for security reasons, i prefer to add the attribute ValidateAntiForgeryToken on top of my baseController so all the actions will be affected from that attribute.</p>
  
  <p>I would like to disable that attribute only for single action. </p>
  
  <p>not deriving for my baseController is not an option.
  unfortunately, ValidateAntiForgeryToken atribute is sealed class so i can't create my own customValidateAntiForgeryToken attribute based on the original ValidateAntiForgeryToken one.  </p>