SSH Tunnel with a dynamically allocated local port in C# using SSH.NET

SshTunnel.cs

class SshTunnel : IDisposable
{
    private SshClient client;
    private ForwardedPortLocal port;
    private int localPort;
    
    public SshTunnel (ConnectionInfo connectionInfo, uint remotePort)
    {
        try {
            client = new SshClient (connectionInfo);
            
            // using 0 for the client port to dynamically allocate it
            port = new ForwardedPortLocal ("127.0.0.1", 0, "127.0.0.1", remotePort);
            
            client.Connect ();
            client.AddForwardedPort(port);
            port.Start();
            
            // HACK to get the dynamically allocated client port
            var listener = (TcpListener) typeof (ForwardedPortLocal).GetField ("_listener", BindingFlags.Instance | BindingFlags.NonPublic).GetValue (port);
            localPort = ((System.Net.IPEndPoint) listener.LocalEndpoint).Port;
        } catch {
            Dispose ();
            throw;
        }
    }
    
    public int LocalPort { get { return localPort; } }
    
    public void Dispose ()
    {
        if (port != null)
            port.Dispose ();
        if (client != null)
            client.Dispose ();
    }
}