BCR.ImageCache.LoadFromCache C# (CSharp) Method

        public MemoryStream LoadFromCache(string filename, bool thumbnail)
        {
            if (cache_size <= 0)
            return null;

              try
              {
            byte[] content = File.ReadAllBytes((thumbnail ? thumbnail_folder : cache_folder) + filename);
            MemoryStream stream = new MemoryStream(content);
            return stream;
              }
              catch
              {
            return null;
              }
        }