Silverlight中的连接速度测试

我会启动一个Web请求,然后花多长时间。类似:

公共部分类页:UserControl { 开始日期时间;

public Page()
{
    InitializeComponent();

    WebClient client = new WebClient();
    client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
    started = DateTime.Now;
    client.DownloadStringAsync(new Uri("SomeKnownURI...", UriKind.Relative));
}

void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
    //error checking...
    TimeSpan ts = DateTime.Now - started;

    throw new NotImplementedException();
}

}