解决串口死锁

代码

bool closing = false;
bool listening = false;

//打开or关闭串口
btnOpen_Click()
{
    if(btnOpen.Text == "Open")
    {
        serial.Open();
    }
    else
    {
        closing = true;
        while(listening)Application.DoEvents();
        serial.Close();
        closing = false;
    }
}
//串口数据监听
serial_DataReceived()
{
    if(closing)return;
    try
    {
        listening = true;
        

        //读取数据等相关操作
        ……

    }
    catch{}
    finally{listening=false;}
}
//退出程序
btnExit_Click()
{
    closing = true;
    while(listening)Application.DoEvents();
    serial.Close();

    Application.Exit();
}