public void AddUserToScheduleItem(ScheduleItemAddress scheduleItemAddress, Guid userID) { var scheduleItem = GetScheduleItem(scheduleItemAddress); repository.AddUserRelationship(scheduleItem.ToScheduleItemSmall(), userID); //cache.InvalidateItem(scheduleItem); //var key = string.Format("GetScheduleItemsByUser-UserID:{0}", userID); //cache.InvalidateContains(key, StringComparer.InvariantCultureIgnoreCase); }