Answered: Using SSH as data transport layer only

If you want to access raw SSH channel using low-level API, you can use IShellChannelFactory.CreateShellChannel() method.

It can be used like this:

var ssh = new Ssh();
ssh.Connect(...);
ssh.Login(...);

var factory = (IShellChannelFactory)ssh;
var options = new TerminalOptions() { TerminalName = "vt100" };
var channel = factory.CreateShellChannel(options, 80, 24);

Using given channel, you can use:

• Poll() - to determine state of the channel
• Receive() - to receive raw data sent by server
• Send() - to send raw data to server

Just to demonstrate how it can be used, a very simple console SSH client can be written like this:

var buffer = new byte[8 * 1024];
while (true)
{
    switch (channel.Poll(50 * 1000))
    {
        case PollResult.NoData:
            if (!Console.KeyAvailable)
                break;
            string command = Console.ReadLine();
            byte[] commandRaw = Encoding.UTF8.GetBytes(command + "\r");
            channel.Send(commandRaw, 0, commandRaw.Length);
            break;

        case PollResult.DataAvailable:
            int n = channel.Receive(buffer, 0, buffer.Length);
            Console.Write(Encoding.UTF8.GetString(buffer, 0, n));
            break;

        case PollResult.Closed:
            Console.WriteLine("Disconnected");
            return;
    }
}