protected override void OnEnter()
{
Updater_.SetProgressID(StageProgressID.DownloadResInfoBegin);
Updater_.SetProgressValue(0);
Updater_.ClearError();
StageCode_ = StageCode.Continue;
DownloadTask Task = Downloader.Start(Updater_.GetResVersionInfo().ResUrl_, UpdateTool.ServerVersionInfoPath_, string.Empty, true);
Task.Progress += OnProgressCallback;
Task.Completed += OnCompletedCallback;
}