dotnet C# 获取一个可用的端口的方法

        public static int GetAvailablePort(IPAddress ip)
        {
            TcpListener l = new TcpListener(ip, 0);
            l.Start();
            int port = ((IPEndPoint)l.LocalEndpoint).Port;
            l.Stop();
            return port;
        }

        public static int GetAvailablePort(IPAddress ip)
        {
            using var socket = new Socket(SocketType.Stream, ProtocolType.Tcp);
            socket.Bind(new IPEndPoint(ip, 0));
            socket.Listen(1);
            var ipEndPoint = (IPEndPoint)socket.LocalEndPoint;
            var port = ipEndPoint.Port;
            return port;
        }