title: Expiration callback in StackExchange.Redis
body: <p>Does StackExchange.Redis has any ability to execute callback after cache item was expired?
  Like ICacheItemRefreshAction in Microsoft.Practices.EnterpriseLibrary.Caching</p>
  
  <pre><code>    [Serializable]
      private class CacheEventHandler : ICacheItemRefreshAction
      {
          public void Refresh(string key, object expiredValue, CacheItemRemovedReason removalReason)
          {
              // Item has been removed from cache. Perform desired actions here, based upon
              // the removal reason (e.g. refresh the cache with the item).
              ResetStaticData();
          }
      }
  </code></pre>