vb.net - how to start new thread as soon as previously thread gets finished? -

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i have develop windows service copy files different servers. have task using multi-theading. have start 3-4 threads. whenever 1 threads finished have start new thread count of thread should remain 3 or 4. how apply check on ? please provide information on it.

this might give starting point. idea use blocking queue block on dequeue operation until item available. worker threads spin around infinite loop waiting items appear in queue. main thread enqueue items queue. following example uses blockingcollection class .net 4.0 bcl. if not available can implementation of blocking queue stephen toub's blog.

module example      private m_queue blockingcollection(of string) = new blockingcollection(of string)      sub main()          dim threads(4) thread         integer = 0 threads.length - 1             threads(i) = new thread(addressof consumer)             threads(i).isbackground = true             threads(i).start()         next          dim files ienumerable(of string) = getfilestocopy()          each filepath string in files             m_queue.add(filepath)         next      end sub      sub consumer()         while true             dim filepath string = m_queue.take()             ' process file here.         loop     end sub  end module

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