如何获取C#中处于“已建立”状态的端口

using System;
using System.Net.NetworkInformation;

class Program
{
    static void Main()
    {
        // 获取IP全局属性
        IPGlobalProperties ipGlobalProperties = IPGlobalProperties.GetIPGlobalProperties();

        // 获取所有TCP连接信息
        TcpConnectionInformation[] tcpConnections = ipGlobalProperties.GetActiveTcpConnections();

        Console.WriteLine("处于已建立状态的端口：");
        foreach (TcpConnectionInformation tcpConnection in tcpConnections)
        {
            if (tcpConnection.State == TcpState.Established)
            {
                Console.WriteLine($"本地端口: {tcpConnection.LocalEndPoint.Port}, 远程端口: {tcpConnection.RemoteEndPoint.Port}");
            }
        }
    }
}