c# 多线程线程池 使用结构体数组来获得返回值 求大侠指点

Question

 public struct qrypara
        {
            public string keyword;
            public CookieContainer cookie;
            public int pos;
            public string url;
            public string qryurl;
            public string errorlog;
        }
private void queryhk(object paraob)
        {
            qrypara qry = (qrypara)paraob;
            try
            {
                此处省略不相关代码....
                int pos = 0;
                ..............
                qry.pos = pos;
                paraob = qry;
            }
            catch (Exception rqste)
            {
                MessageBox.Show(rqste.ToString());
                paraob = qry;
            }
        }
这样子 获取不到返回值是为什么  ??多线程线程池

Answer 1

额 抱歉  多线程 的代码忘记贴出来了   
//结构体数组
public struct qrypara
        {
            public string keyword;
            public CookieContainer cookie;
            public int pos;
            public string url;
            public string qryurl;
            public string errorlog;
        }
ThreadPool.SetMaxThreads(maxthrd, maxthrd);
//循环添加线程
for (int i = 0; i < keytext.Lines.Count();i++ )
                {
                    qry[i].keyword = keytext.Lines[i].ToString();
                    qry[i].cookie = cookie;
                    qry[i].pos = -1;
                    qry[i].qryurl="";
                    qry[i].url = urltxt.Text;
                    keylist.Add(keytext.Lines[i].ToString());
                    ThreadPool.QueueUserWorkItem(new WaitCallback(queryhk), qry[i]);
                }
//多线程调用的方法
private void queryhk(object paraob)
        {
            qrypara qry = (qrypara)paraob;
            try
            {
                此处省略不相关代码....
                int pos = 0;
                ..............
                qry.pos = pos;
                paraob = qry;
            }
            catch (Exception rqste)
            {
                MessageBox.Show(rqste.ToString());
                paraob = qry;
            }
        }
初学者  问的不是很清楚 希望斑竹体谅啦  在线等

Answer 2

换成struct   那我有10个线程 就会获得10组返回值 要怎么写呢