windows-phone-7 – 是否可以使用不同的IsolatedStorageSettings.ApplicationSettings？

我的程序看起来像这样：

在OnNavigatedTo的MainPage.xaml.cs中,我创建了两个音频文件数组

Audio[] aud = new Audio[2];
Audio[] aud1 = new Audio[2];

aud[0] = new Audio(new Uri("1.mp3",UriKind.Relative),"Test1",new Uri("Images/Covers/0000000018724345_256x256_large.jpg",UriKind.Relative));

aud[1] = new Audio(new Uri("2.mp3","Test2",new Uri("Images/Covers/0000000018698018_256x256_large.jpg",UriKind.Relative));

aud1[0] = new Audio(new Uri("3.mp3","Test3",new Uri("Images/Covers/0000000018465020_256x256_large.jpg",UriKind.Relative));

 aud1[1] = new Audio(new Uri("http://traffic.libsyn.com/wpradio/WPRadio_29.mp3",UriKind.Absolute),"Episode 29","Windows Phone Radio",new Uri("Images/Covers/0000000018844939_256x256_large.jpg",UriKind.Relative));

然后我在ApplicationSettings中保存其中一个数组

IsolatedStorageSettings.ApplicationSettings["tracklist"] = aud;
IsolatedStorageSettings.ApplicationSettings.Save();

然后我关闭并启动BackgroundAudioPlayer.

BackgroundAudioPlayer.Instance.Close();
BackgroundAudioPlayer.Instance.Play();

在我的AudioPlayer中,我正在加载以前保存的ApplicationSettings,它工作正常.

Audio[] aud;
IsolatedStorageSettings.ApplicationSettings.TryGetValue<Audio[]>("tracklist",out aud);

但是当我后来想要将MainPage.xaml.cs中的ApplicationSettings替换为另一个数组时

IsolatedStorageSettings.ApplicationSettings["tracklist"] = aud1;
  IsolatedStorageSettings.ApplicationSettings.Save();

并在我的AudioPlayer中再次加载值,我的ApplicationSettings中仍然存在旧值,AudioPlayerAgent和MainPage应该使用相同的ApplicationSettings吗？事实上,第一次保存并可用于AudioPlayerAgent,所以我错过了什么？

我的Audio类看起来像这样

[DataContractAttribute] 
public class Audio
{
    [DataMember]
    public Uri TrackUrl { get; set; }

    [DataMember]
    public string Title { get; set; }

    [DataMember]
    public string Artist { get; set; }

    [DataMember]
    public Uri CoverURL { get; set; }

    public Audio(Uri trackUrl,string title,string artist,Uri coverUrl)
    {
        TrackUrl = trackUrl;
        Title = title;
        Artist = artist;
        CoverURL = coverUrl;
    }
}