不理解的多线程，当p.Kill();的时候线程都禁止了，应用程序都退出了，那下面的语句应该不会执行了？我想要的效果是结速当前运行的进程，同时将网上下载的覆盖当前运行的.exe文件，实现一种自动更新的功能，如果不用p.Kill();话，是可以执行的，但是又出现问题了，会提示该文件正在被另一个进程占用，不能覆盖和访问此文件，（但是目的就是为了停止当前线程，从网上下载更新版的线程，下载完毕后，启动下载最新的版本）

Process [] allProcess = Process.GetProcesses();
   foreach(Process p in allProcess)
   {
    if (p.ProcessName.ToLower() + ".exe" == mainAppExe.ToLower() )
    {
     for(int i=0;i<p.Threads.Count;i++)
      p.Threads[i].Dispose();
     p.Kill();
     isRun = true;
     //break;
    }
   }
   WebClient wcClient = new WebClient();
   for(int i = 0;i < this.lvUpdateList.Items.Count;i++)
   {
    string UpdateFile = lvUpdateList.Items[i].Text.Trim();
    string updateFileUrl = updateUrl + lvUpdateList.Items[i].Text.Trim();
    long fileLength = 0;

    WebRequest webReq = WebRequest.Create(updateFileUrl);
    WebResponse webRes = webReq.GetResponse();
    fileLength = webRes.ContentLength;
    
    lbState.Text = "正在下载更新文件,请稍后...";
    pbDownFile.Value = 0;
    pbDownFile.Maximum = (int)fileLength;

    try
    { 
     Stream srm = webRes.GetResponseStream();
     StreamReader srmReader = new StreamReader(srm);
     byte[] bufferbyte = new byte[fileLength];
     int allByte = (int)bufferbyte.Length;
     int startByte = 0;
     while(fileLength > 0)
     {
      Application.DoEvents();
      int downByte = srm.Read(bufferbyte,startByte,allByte);
      if (downByte == 0) {break;};
      startByte += downByte;
      allByte -= downByte;
      pbDownFile.Value += downByte;

      float part = (float)startByte / 1024;
      float total = (float)bufferbyte.Length / 1024;
      int percent =Convert.ToInt32((part/total)*100);

      this.lvUpdateList.Items[i].SubItems[2].Text = percent.ToString() + "%";

     }
     
     string tempPath = tempUpdatePath + UpdateFile;
     CreateDirtory(tempPath);
     FileStream fs = new FileStream(tempPath,FileMode.OpenOrCreate,FileAccess.Write);
     fs.Write(bufferbyte,0,bufferbyte.Length);
     srm.Close();
     srmReader.Close();
     fs.Close();
 
     
    }
    catch(WebException ex)
    {
     MessageBox.Show("更新文件下载失败！"+ex.Message.ToString(),"错误",MessageBoxButtons.OK,MessageBoxIcon.Error);
    }
   }