public void SSHDelete()
        {
            const String host = "212.237.20.10";
            const String username = "root";
            const String password = "T{1*z1#oye";
            const int port = 22;

            using (SftpClient sftp = new SftpClient(host, port, username, password))
            {
                sftp.Connect();
                sftp.DeleteFile("/home/photos/2.jpg");
                sftp.Disconnect();
            }
        }