我刚学线程 弄不懂 高手帮我看看下面的代码是多线程吗.... 这是我做的网站监控程序(初学)..功能是检查网站的标题 是否跟我设置的监控码一样 .程序中str是网站地址，str2 是监控码也就是网站的标题 title是从网站源代码中获取的网站标题    如果不相等就气泡提示 可是我都是设置的相等的 他都一直气泡提示...我改怎么做...？请教教我..
int rows = this.listView1.Items.Count;
           int i=0;
           while(i<rows)
           {
               str = listView1.Items[i].SubItems[1].Text.ToString() ;
               str2 = listView1.Items[i].SubItems[2].Text.ToString();
               this.label3.Text += str2;
               Thread newThreadi = new Thread(new ThreadStart(proc));           
               newThreadi.Start();
                i++;
            }


public void proc()
        {
            WebClient web = new WebClient();
            byte[] data = web.DownloadData(str);
            string res = Encoding.Default.GetString(data);
            web.Dispose();
            int loc1 = res.IndexOf("<title>");
            int loc2 = res.IndexOf("</title>");
            string title = res.Substring(loc1 + 7, loc2 - (loc1 +7)).ToString();
            if (title != str2)
            {
                this.notifyIcon1.ShowBalloonTip(2, "温馨提示", "打开首页异常，请联系13523859270" + title, System.Windows.Forms.ToolTipIcon.Error);

            }

        }