使用C#的可用TCP端口探测

using System;
using System.Net;
using System.Net.Sockets;

public class TcpPortScanner
{
    public static bool IsPortOpen(int port)
    {
        bool isOpen = false;

        try
        {
            TcpClient client = new TcpClient();
            client.Connect("localhost", port);
            client.Close();
        }
        catch (SocketException)
        {
            isOpen = true;
        }

        return isOpen;
    }
}

int port = 8080;
if (TcpPortScanner.IsPortOpen(port))
{
    Console.WriteLine($"Port {port} is open.");
}
else
{
    Console.WriteLine($"Port {port} is not open.");
}