private void BeginCountCurrentCacheSize()
        {
            Task.Factory.StartNew(() =>
            {
                // Pattern to match all innerFiles and innerDirectories inside absoluteDirPath
                var filesAndDirectoriesPattern = CacheDirectory + @"\*";

                string[] cacheFileNames;

                try
                {
                    cacheFileNames = ISF.GetFileNames(Path.Combine(CacheDirectory, filesAndDirectoriesPattern));
                }
                catch
                {
                    return;
                }

                long cacheSizeInBytes = 0;

                foreach (var cacheFileName in cacheFileNames)
                {
                    var fullCacheFilePath = Path.Combine(CacheDirectory, cacheFileName);

                    try
                    {
                        using (var file = ISF.OpenFile(fullCacheFilePath, FileMode.Open, FileAccess.Read))
                        {
                            cacheSizeInBytes += file.Length;

                            _lastAccessTimeDictionary.Add(fullCacheFilePath, DateTimeUtil.ConvertDateTimeToMillis(ISF.GetLastAccessTime(fullCacheFilePath).DateTime));
                        }
                    }
                    catch
                    {
                        JetImageLoader.Log("[error] can not get cache's file size: " + fullCacheFilePath);
                    }
                }

                CurrentCacheSizeInBytes += cacheSizeInBytes; // Updating current cache size
            });
        }