使用类、类的方法或类的属性都可以向线程传递参数：
public class UrlDownloader{    string url;    public UrlDownloader (string url)    {        this.url = url;    }    public void Download()    {
        WebClient wc = new WebClient();
        Console.WriteLine("Downloading " + url);                                byte[] buffer = wc.DownloadData (url);        string download = Encoding.ASCII.GetString(buffer);        Console.WriteLine(download);        Console.WriteLine("Download successful.");
        //这里你可以将download进行保存等处理......    }}[... 在另一个类中使用它们...]              UrlDownloader downloader = new UrlDownloader (yourUrl);new Thread (new ThreadStart (downloader.Download)).Start();

注意参数是如何传递的。

在.NET 2.0中还可以这样：

(CODE-BESIDE）
方式一：

ThreadStart starter = delegate { Download(yourUrl); });new Thread(starter).Start();
//使用线程池
WaitCallback callback = delegate (object state) { Download ((string)state); };ThreadPool.QueueUserWorkItem (callback, yourUrl);
方式二(使用ParameterizedThreadStart)：
Thread t = new Thread (new ParameterizedThreadStart(DownloadUrl));t.Start (myUrl);static void DownloadUrl(object url){    // ....
}