public void ClearCache()
 {
     while (filePageCacheQueue.Count > 0)
     {
         FilePageCache cacheToDestory = filePageCacheQueue.Dequeue();
         foreach (GameObject fileOverview in cacheToDestory.fileOverviews)
         {
             if (fileOverview != null)
             {
                 Destroy(fileOverview);
             }
         }
     }
 }
    void SaveCache()
    {
        FilePageCache filePageCache = new FilePageCache(this);

        if (filePageCacheQueue.Count >= 4)
        {
            FilePageCache cacheToDestory = filePageCacheQueue.Dequeue();
            foreach (GameObject fileOverview in cacheToDestory.fileOverviews)
            {
                Destroy(fileOverview);
            }
        }

        filePageCacheQueue.Enqueue(filePageCache);
    }