public static void SaveFrom(ISaveData instance)
 {
     if (instance != null)
     {
         if (!Directory.Exists(_folder))
         {
             Directory.CreateDirectory(_folder);
         }
         var fileName = AddOrChangeFileName(instance.SaveTag());
         File.WriteAllBytes(GetPath(fileName), AESUtils.AESEncrypt(instance.SaveAsJson()));
     }
 }
        // 存储索引到文件
        static void SaveFileNames()
        {
            var      indexFilePath = GetPath(_saveFile);
            JsonData data          = new JsonData();

            foreach (var pair in _fileNames)
            {
                data[pair.Key] = pair.Value;
            }
            var json = data.ToJson();

            File.WriteAllBytes(indexFilePath, AESUtils.AESEncrypt(json));
        }