Set authorization for a whole area

public class FilterConfig
{
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new CustomAuthorizeAttribute());
filters.Add(new HandleErrorAttribute());
}
}

public class CustomAuthorizeAttribute : AuthorizeAttribute
{
protected override bool AuthorizeCore(HttpContextBase httpContext)
{
var routeData = httpContext.Request.RequestContext.RouteData;
var controller = routeData.GetRequiredString("controller");
var action = routeData.GetRequiredString("action");
var area = routeData.DataTokens["area"];
var user = httpContext.User;
if (area != null && area.ToString() == "Customer")
{
if (!user.Identity.IsAuthenticated)
return false;
}
else if (area != null && area.ToString() == "Admin")
{
if (!user.Identity.IsAuthenticated)
return false;
if (!user.IsInRole("Admin"))
return false;
}
return true;
}
}