async private void Btn_Refresh_Click(object sender, RoutedEventArgs e)
        {
            Btn_Refresh.IsEnabled = false;
            var lyricList = await LyricFetchController.FetchLyricList();

            LynicSerialization lynicSerialization = new LynicSerialization("lyric.dat");

            lynicSerialization.Serialize(lyricList);
            Btn_Refresh.IsEnabled = true;
        }
 async public Task FetchLyricListTest()
 {
     var result = await LyricFetchController.FetchLyricList();
 }