问C# -用.Net内核进行端口映射

EN

using Open.Nat;
using System;
using System.Threading;
using System.Threading.Tasks;
...
        public static async Task OpenPort(int port, string description)
        {
            try
            {
                
                NatDiscoverer discoverer = new NatDiscoverer();
                CancellationTokenSource cts = new CancellationTokenSource(10000);
                NatDevice device = await discoverer.DiscoverDeviceAsync(PortMapper.Upnp, cts);
                Mapping map = new(Protocol.Tcp, port, port, description);
                await device.CreatePortMapAsync(map);
                Console.WriteLine($"Created {map}");
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                Console.WriteLine(e.StackTrace);
            }
        }