How to get a welcome message from FTP server?

Yes, I'm using FileZilla. I'm trying to get a greeting from Filezilla in my app (WinForm).

I launched FileZilla on the local machine. Then in the application settings (FileZilla Server Options) I changed property "Welcome message = Hello world!".

Then in my c# WinForm application I wrote this:
using (TcpClient client = new TcpClient())
{
var result = client.BeginConnect(ftpIP, 21, null, null);
}

When I execute this, FileZilla show in its own window:
(not logged in) (127.0.0.1)> Connected, sending welcome message...
(not logged in) (127.0.0.1)> 220-Hello world!

How to capture in my application ftp-server response?