Enterprise-Grade
SSH Library
for .NET

using TwSsh.Client;
using TwSsh.Sftp;

await using var client = new SshClient(settings);
await client.ConnectAndAuthenticateAsync();

// Create SFTP client
await using var sftp = await SftpClient.ConnectAsync(client);

// Upload with progress
var progress = new Progress<SftpTransferProgress>(p =>
    Console.WriteLine($"{p.PercentComplete:F1}% complete"));

await sftp.UploadFileAsync("backup.zip", "/remote/backup.zip",
    new SftpTransferOptions(), progress);

// List directory
var files = await sftp.ListDirectoryAsync("/home/user");
foreach (var file in files)
    Console.WriteLine($"{file.FileName} - {file.Attributes.Size} bytes");

using TwSsh.Client;
using TwSsh.Connection;

await using var client = new SshClient(settings);
await client.ConnectAndAuthenticateAsync();

// Create interactive shell with PTY
await using var shell = await client.CreateShellAsync(new PtyRequest
{
    TerminalType = "xterm-256color",
    Columns = 120,
    Rows = 40
});

// Send commands
await shell.WriteLineAsync("top -n 1");

// Read output using Stream API
var buffer = new byte[4096];
var bytesRead = await shell.ReadAsync(buffer);
Console.Write(Encoding.UTF8.GetString(buffer, 0, bytesRead));

// Or use the convenient Expect method
var output = shell.Expect("$", TimeSpan.FromSeconds(5));
await shell.WriteLineAsync("exit");

using TwSsh.Client;

await using var client = new SshClient(settings);
await client.ConnectAndAuthenticateAsync();

// Forward local port 5432 to remote PostgreSQL
var tunnel = await client.ForwardLocalPortAsync(
    localHost: "127.0.0.1",
    localPort: 5432,
    remoteHost: "db.internal",
    remotePort: 5432
);

Console.WriteLine("Tunnel active. Connect to localhost:5432");

// Keep tunnel open until cancelled
await Task.Delay(Timeout.Infinite, cancellationToken);

// Tunnel automatically closes when client is disposed