在C#中,我如何收听已经打开的COM(串行)端口？

using System;
using System.IO.Ports;

namespace ComPortListener
{
    class Program
    {
        static void Main(string[] args)
        {
            string comPort = "COM3"; // 请根据实际情况修改串口名称
            int baudRate = 9600; // 请根据实际情况修改波特率

            SerialPort serialPort = new SerialPort(comPort, baudRate);

            try
            {
                serialPort.Open();
                Console.WriteLine($"成功打开串口 {comPort}");

                serialPort.DataReceived += SerialPort_DataReceived;
            }
            catch (Exception ex)
            {
                Console.WriteLine($"打开串口 {comPort} 时出错: {ex.Message}");
            }

            Console.ReadLine();
        }

        private static void SerialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            SerialPort serialPort = (SerialPort)sender;
            string receivedData = serialPort.ReadExisting();
            Console.WriteLine($"从串口 {serialPort.PortName} 接收到数据: {receivedData}");
        }
    }
}