public static ICollection<AssetList> LoadAssets()
{
string configFile = HttpContext.Current.Server.MapPath("~/App_Data/AssetPackager.xml");
CacheDependency dependency = new CacheDependency(configFile);
return (List<AssetList>) CacheHelper.GetData(Settings.CacheKey, dependency, DateTime.Now.AddDays(30),
CacheItemPriority.NotRemovable,
delegate { return LoadAssetLists(configFile); });
}