xaml – 如何在运行时更改Windows Phone APP语言？

我成功地将资源数据绑定到这样的文本：

<TextBlock x:Name="ApplicationTitle" Text="{Binding Path=MultiLangResources.Mainpage_Welcome,Source={StaticResource MultiLang}}"/>

我试图改变Thread.CurrentThread.CurrentUICulture,我可以用代码输出正确的密钥：

ApplicationTitle.Text = LangResource.Mainpage_Welcome;

但是,绑定文本永远不会更新.

如何使绑定文本更新像普通绑定？

有没有人可以帮我解决这个问题？
我也尝试过没有运气.

public class MultiLang : INotifyPropertyChanged
{
    public MultiLang()
    {
    }

    private static MLTest.LangResource multiLangResources = new GigapodV2.LangResource();

    public MLTest.LangResource MultiLangResources
    {
        get { return multiLangResources; }
        set
        {
            if (value != multiLangResources)
            {
                multiLangResources = value;
                NotifyPropertyChanged("MultiLangResources");
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void NotifyPropertyChanged(string property)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (PropertyChanged != null)
        {
            PropertyChanged(this,new PropertyChangedEventArgs(property));
        }
    }
}