/// <summary>
/// App.xaml 的交互逻辑
/// </summary>
public partial class App : Application
{
    private Sparkle _sparkle;
    ......
    // 检查更新
    Console.WriteLine("check update...");
    string UpdateUrl = spph.Properties.Settings.Default.DbServer;   // 获取server地址
    _sparkle = new Sparkle("ftp://" + UpdateUrl + "/spph/versioninfo.xml"); // 传入更新文件地址
    //_sparkle.ShowDiagnosticWindow = true;     // 更新程序调试窗口,日志在%temp%\spph_update.log
    _sparkle.StartLoop(true, true);
    ......
    // 停止检测更新
    _sparkle.StopLoop();
    ......
}