从VS2005开始就不允许非创建此控件的线程来调用它，那么解决方法是在该控件所在窗体里加上一句话：
CheckForIllegalCrossThreadCalls = false;

        private void Form1_Load(object sender, EventArgs e)
        {
            CheckForIllegalCrossThreadCalls = false;
            //信号量
            signel sgl = new signel(10);

            //新建一个队列缓冲区
            Queue<int> que = new Queue<int>(10);
            Reader readerThread = new Reader(sgl,que,this);
            Writer writerThread = new Writer(sgl,que,this);
            //开启两个线程
            Thread tRead = new Thread(readerThread.Process);
            Thread tWrite= new Thread(writerThread.Process);
            tRead.Start();
            tWrite.Start();
        }