Declarative ASP.NET globalization

using System;
using System.Resources;
using System.Reflection;
using System.Globalization;
using GlobalizationModule;

namespace MyWebApp
{
    /// <summary>
    /// Special LocalizeAttribute for localizing both 
    /// Text and ToolTip fields of a label.
    /// </summary>
    [AttributeUsage(AttributeTargets.Field, AllowMultiple = false)]
    public class TooltipLocalizerAttribute : LocalizeAttribute
    {
        public TooltipLocalizerAttribute()
        {}

        private string tooltipResourceName_;
        /// <summary>
        /// Name of the tooltip resource.
        /// </summary>
        public string ToolTipResourceName
        {
            get { return tooltipResourceName_; }
            set { tooltipResourceName_ = value; }
        }

        /// <summary>
        /// 
        /// </summary>
        public override void LocalizeObject(object target, System.Web.UI.Page page)
        {
            // User's page class is superclass of the ASP.NET page class
            Type userPageClass = page.GetType().BaseType;
            // The user's assembly is the one that holds his/her page class
            Assembly targetAssembly = userPageClass.Assembly;

            CultureInfo culture = System.Threading.Thread.CurrentThread.CurrentUICulture;
            System.Web.UI.WebControls.Label label = (System.Web.UI.WebControls.Label)target;
            
            // Localize label's Text property
            label.Text = (string)base.LoadResource(
                    this.ResourceName, culture, page, targetAssembly);
 
            // Localize label's Tooltip property
            label.ToolTip = (string)base.LoadResource(
                this.ToolTipResourceName, culture, page, targetAssembly);
        }
    }    
}