网上找的代码片段，本地运行正常，发布后路径也更改  但是下载下来的TZ.rar一直都是 20字节，是什么原因呢？

/// <summary>  
        /// 压缩文件
        /// </summary>
        /// <returns>返回压缩后的路径</returns>
        public string YaSuo(out bool bo, out TimeSpan times)
        {
            string rarurlPath = string.Empty;
            bo = false;
            //压缩文件
            string yasuoPathSave = "c:\\de\\TZ.rar";
            string yasuoPath = "c:\\de\\temp";
            System.Diagnostics.Process pro = new System.Diagnostics.Process();
            pro.StartInfo.FileName = @"C:\Program Files\WinRAR\WinRAR.exe";//WinRAR所在路径
            //pro.StartInfo.Arguments = "a " + yasuoPathSave + " " + yasuoPath + " -r ";//dir是你的目录名
            pro.StartInfo.Arguments = string.Format("a {0} {1} -r",yasuoPathSave,yasuoPath);
 
            pro.Start();
            times = pro.TotalProcessorTime;
            bo = pro.WaitForExit(60000);//设定一分钟
            if (!bo)
                pro.Kill();
            pro.Close();
            pro.Dispose();
            rarurlPath = yasuoPathSave;
            return rarurlPath;
        }