ASP.NET MVC : how do I return 304 “Not Modified” status?

Question

ASP.NET MVC 3.0, IIS 7, .NET 4

I have an action that returns data that seldom changes (almost static).

Is there an easy way to:

1. return 304 \"

Answer 1

Whats wrong with this for 304?

        Response.StatusCode = 304;
        Response.StatusDescription = "Not Modified";
        return Content(String.Empty);

and this for LastModified:

        Response.Cache.SetLastModified(DateTime.Now);

Or maybe just create a 'Not Modified' Filter.