protected void Notify(CacheDependencyChangeTypes changeType)
 {
     if (changeType == CacheDependencyChangeTypes.Changed)
     {
         _hasExpired = true;
     }
 }
 public CacheDependencyChangedEventArgs(object data, CacheDependencyChangeTypes changeType)
 {
     Data = data;
     ChangeType = changeType;
 }