some_controller.cs

public  class SomeController : IController
{

  public override void Index()
  {
    //Index action
  }

  public override void Show()
  {
    //Show action
  }

  [Authenticate]
  public override void Destroy()
  {
    //Destroy
  }

}

[Serializable]
public class AuthenticateAttribute: OnMethodBoundaryAspect
{
  public override void OnEntry( MethodExecutionEventArgs eventArgs)
  {
    //Authenticate 
  }

  public override void OnExit( MethodExecutionEventArgs eventArgs){ } 
}