在.Net中查找下一个TCP端口

using System;
using System.Net.Sockets;

public class NextAvailableTcpPort
{
    public static int GetNextAvailableTcpPort(int startingPort)
    {
        int port = startingPort;

        while (port <= 65535)
        {
            TcpListener listener = null;

            try
            {
                listener = new TcpListener(IPAddress.Any, port);
                listener.Start();
                listener.Stop();
                return port;
            }
            catch (Exception ex)
            {
                // Handle the exception if you need to.
            }
            finally
            {
                listener?.Stop();
            }

            port++;
        }

        return -1; // Indicates that no available port was found.
    }
}