private SessionOptions GetSessionOptions(string password)
{
  // Setup session options
  var sessionOptions = new SessionOptions
  {
    Protocol = (this._ftpType == FtpType.ActiveFTP || this._ftpType == FtpType.PassiveFTP)
      ? Protocol.Ftp
      : Protocol.Sftp,
    HostName = this._host,
    UserName = this._userName,
    Password = password,
    PortNumber = this._port,
    FtpMode = this._ftpType == FtpType.ActiveFTP ? FtpMode.Active : FtpMode.Passive,
    SshHostKeyPolicy = this._ftpType == FtpType.SFTP ? SshHostKeyPolicy.AcceptNew : SshHostKeyPolicy.Check
  };
 
  if (sessionOptions.Protocol == Protocol.Sftp && !string.IsNullOrEmpty(this._privateKeyFile))
  {
    sessionOptions.SshPrivateKeyPath = this._privateKeyFile;
  }
 
  return sessionOptions;
}