实现目标：1.多语言实时切换

　　　　　2.使用系统自带的多语言机制

　　　　   3.支持xaml绑定

实现方法：

Step1. 创建语言文件lang.resx

Step2. 创建多语言文件lang.resx.zh-cn

Step3.右键卸载项目，并编辑。

　　    在    <SupportedCultures>       zh-cn     </SupportedCultures> 中添加

Step4.创建langhelper辅助类

    public class langhelper:INotifyPropertyChanged
    {
        public string this[string resourceName]
        {
            get
            {
                return resource.lang.ResourceManager.GetString(resourceName);
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        public void UpdateBindings()
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs("Item[]"));
        }
    }

///<summary>
/// 语言资源访问器(可绑定)
///</summary>
public langhelper lang { get; private set; }

private static MainViewModel viewModel = null;

/// <summary>
/// A static ViewModel used by the views to bind against.
/// </summary>
/// <returns>The MainViewModel object.</returns>
public static MainViewModel ViewModel
{
    get
    {
        // Delay creation of the view model until necessary
        if (viewModel == null)
            viewModel = new MainViewModel();

        return viewModel;
    }
}

{Binding lang[appbar_search]}
//其中appbar_search就是你在多语言resx文件中添加的字符串

CultureInfo info = new CultureInfo("zh-cn");//en-us;.....
Thread.CurrentThread.CurrentCulture = info;
Thread.CurrentThread.CurrentUICulture = info;