Simple way to override controller auth at the action level

CustomAuth.cs

    // New attribute that is only usable at the method (action) level
    [AttributeUsage(AttributeTargets.Method, Inherited = true, AllowMultiple = true)]
    public class ActionAuthorizeAttribute : AuthorizeAttribute {
    }

    // New attribute that is only usable at the class (controller) level
    [AttributeUsage(AttributeTargets.Class, Inherited = true, AllowMultiple = true)]
    public class ControllerAuthorizeAttribute : AuthorizeAttribute
    {

        public override void OnAuthorization(AuthorizationContext filterContext)
        {
            //If the target action has been decorated with an ActionAuthorizeAttribute, skip controller auth
            if (filterContext.ActionDescriptor.GetCustomAttributes(true).Any(a => a is ActionAuthorizeAttribute))
            {
                return;
            }
            base.OnAuthorization(filterContext);
        }
        
    }