【多线程】用多线程生成静态页提高效率的有关问题

【多线程】用多线程生成静态页提高效率的问题
公司做一个cms系统，我负责生成静态这一块。功能都做了，但是生成速度比较慢，想到多线程可以提高效率。所以就弄上来，结果出现了一些问题（多线程还没完全搞懂），

一个是在子线程里面调用进度条功能，报错

还有一个是会发生两个子线程同时操作同一个文件（生成同一篇文章）报错

好了代码贴一下，求大神指点

/// <summary>

        /// 生成文章内容

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        protected void CreatNews(string ClassId)

        {

            string id = this.ddlClass.SelectedValue;

            string where = id == "0" ? "" : (" n.Classid in(" + ClassId + ")");


            int k = 0;

            int r = 0, p = 0;

            DataTable dts = new TCms.DAL.News().BindPage2(where, 1, 10000, out r, out p);

            k = p;


            TCms.Common.HProgressBar.Start();

            createVo = new TCms.Common.CreateHtmlVo();

            createVo.Count = r;

            dts.Dispose();



            for (int i = 1; i <= k; i++)

            {

                dt_news = new TCms.DAL.News().BindPage2(where, i, 10000, out r, out p);


                Thread thread1 = new Thread(new ThreadStart(create));

                Thread thread2 = new Thread(new ThreadStart(create));

                Thread thread3 = new Thread(new ThreadStart(create));

                Thread thread4 = new Thread(new ThreadStart(create));

                Thread thread5 = new Thread(new ThreadStart(create));

                Thread thread6 = new Thread(new ThreadStart(create));

                Thread thread7 = new Thread(new ThreadStart(create));

                Thread thread8 = new Thread(new ThreadStart(create));

                Thread thread9 = new Thread(new ThreadStart(create));

                Thread thread10 = new Thread(new ThreadStart(create));


                thread1.Start();

                thread2.Start();

                thread3.Start();

                thread4.Start();

                thread5.Start();

                thread6.Start();

                thread7.Start();

                thread8.Start();

                thread9.Start();

                thread10.Start();


            }


            if (createVo.Count == createVo.Succount)

            {

                Toop = "<script>alert('生成成功');location.href=location.href;</script>";

            }