无法中止/取消同步/杀死后台线程

我们正在创建数千个后台线程，也正在特定时间段后中止/杀死它们

We are creating thousands of background threads, also we are aborting/killing them after particular span of time

最后，我们正在检查所有后台线程是否仍在运行，并通过中止/杀死它们来强制尝试摆脱它们

Finally we are checking what all background threads are still alive and forcefully trying to get rid of them by aborting/killing them

下面是我们正在努力中止/处置后台线程的代码段

Below is the code snippet where we are struggling to abort/dispose background thread

此外，我们已经成功关闭了几乎所有的后台线程，但是其中的一些线程并没有被杀死.

Also, we are successfully closing almost all the background threads however few of them are not getting killed.

先谢谢您

如果(ThreadNames.Count> 0)
                    {
               b foreach(线程名称中的变量项)
               b {
              nbsp; bsp   如果(DateTime.Now> item.Value)
              nbsp; bsp    {
              nbsp; bsp       ThreadNames.Remove(item.Key);
              nbsp; bsp       item.Key.CancelAsync();
              nbsp; bsp       item.Key.Dispose();
              nbsp; bsp    }
               b }
                    }

if (ThreadNames.Count > 0)
                    {
                        foreach (var item in ThreadNames)
                        {
                            if (DateTime.Now > item.Value)
                            {
                                ThreadNames.Remove(item.Key);
                                item.Key.CancelAsync();
                                item.Key.Dispose();
                            }
                        }
                    }