# LibTmux.Session.AttachAsync

- **Module:** LibTmux.Session
- **Package:** LibTmux
- **Language:** .NET
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-dotnet/blob/6656a563ec9e07ab52e0c3ac96f7704fc94cc0c0/src/LibTmux/Session.Lifecycle.cs#L265
- **Page:** https://libtmux.org/reference/dotnet/libtmux-session-attachasync/

```
LibTmux.Session.AttachAsync(request: AttachSessionRequest?, cancellationToken: CancellationToken) -> Task<Session>
```

Attaches a client to this session.

Attaching needs a terminal, so this fails outside one rather than
silently doing nothing.

## Parameters

- `request` (AttachSessionRequest?) — Attachment options.
- `cancellationToken` (CancellationToken) — Cancels the tmux command.

## Returns

A refreshed handle for this session.