Is it possible to simulate a FTP server in C #? [closed]

I need to run automated integration tests in an application whose functionalities have external dependencies such as FTP. I would like to know if it is possible to simulate an FTP as it is possible to simulate a database with Moq, for example.

Until then, in my searches I only found NuGet frameworks and packages that create FTP servers, but it is not my goal at the moment. I would like to resort to this only if it is not possible to simulate the tests.

For now, I've created a class that communicates with an existing FTP server.

    public class FTPComunicacao
    {

        private void DownloadArquivo(string ftpDiretorioPath, string username, string senha, string destinoLocalArquivoPath)
        {
            int bytesRead = 0;
            byte[] buffer = new byte[2048];

        FtpWebRequest ftp = (FtpWebRequest)WebRequest.Create(new Uri(ftpDiretorioPath));
        ftp.Method = WebRequestMethods.Ftp.DownloadFile;

        Stream reader = ftp.GetResponse().GetResponseStream();
        FileStream fileStream = new FileStream(destinoLocalArquivoPath, FileMode.Create);

        while (true)
        {
            bytesRead = reader.Read(buffer, 0, buffer.Length);
            if(bytesRead == 0)
            {
                break;
            }
            fileStream.Write(buffer, 0, bytesRead);
        }

        fileStream.Close();
    }

    private FtpWebRequest CriaRequisicaoFtp(string ftpDiretorioPath, string username, string senha, bool keepAlive = false)
    {
        FtpWebRequest ftp = (FtpWebRequest)WebRequest.Create(new Uri(ftpDiretorioPath));

        //Setar o proxy como nulo porque se não, o proxy usado vai receber uma resposta html do monitoramento firewall
        ftp.Proxy = null;
        ftp.UsePassive = true;
        ftp.UseBinary = true;
        ftp.KeepAlive = keepAlive;

        ftp.Credentials = new NetworkCredential(username, senha);

        return ftp;
    } 

}