Cache

public class Cache
    {
 
        public static void Add(string name, object data, int hours)
        {
            HttpContext.Current.Cache.Insert(name, data, null, DateTime.Now.AddHours(hours), TimeSpan.Zero);
        }
 
        public static object Get(string name)
        {
            if (HttpContext.Current.Cache[name] != null)
                return HttpContext.Current.Cache[name];
            else
                return null;
        }
    }
 
 
Clear:
foreach (DictionaryEntry entry in Cache)
    Cache.Remove(entry.Key.ToString());