使用類、類的方法或類的屬性都可以向線程傳遞參數：
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.");
        //這里你可以將download進行保存等處理......    }}[... 在另一個類中使用它們...]              urldownloader downloader = new urldownloader (yoururl);new thread (new threadstart (downloader.download)).start();

注意參數是如何傳遞的。

在.net 2.0中還可以這樣：

(code-beside）
方式一：

threadstart starter = delegate { download(yoururl); });new thread(starter).start();
//使用線程池
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){    // ....
}