bool ret = true;
 ConnectionInfo connectionInfo = new ConnectionInfo("addons.inpost24.com", 22323, "inrouting", new PasswordAuthenticationMethod("inrouting", "OFIT6jJbSZRF18HzW"));

 SftpClient sftp = null;

 try
 {
     SendMessage(MessageType.Info, "Pobieranie danych z InPost", false);

     sftp = new SftpClient(connectionInfo);
     sftp.Connect();
     int lncnt = 0;
     using (MemoryStream ms = new MemoryStream())
     {
         SendMessage(MessageType.Info, "Wczytuję plik 'apm_micro_area.csv'", false);
         sftp.DownloadFile("/pl-regions/apm_micro_area/apm_micro_area.csv", ms);
         ms.Position = 0;
         using (StreamReader reader = new StreamReader(ms))
         {
             string header = reader.ReadLine();
             if (header == "box_machine_name;area_number;micro_area")
             {
                 while (!reader.EndOfStream)
                 {
                     lncnt++;
                     SendMessage(MessageType.Count, $"Plik: apm_micro_area.csv; Linia: {lncnt}", false);
                     string[] line = reader.ReadLine().Split(';').Select(t => t.Trim('"', '\'')).ToArray();
                     Data.Inpost.SetMicroArea(line[0], line[1], line[2]);
                 }
             }
             else
                 SendMessage(MessageType.Warning, "Nieznany nagłówek", false);
         }
         SendMessage(MessageType.Info, $"Wczytano {lncnt} linii", false);
     }
     lncnt = 0;
     using (MemoryStream ms = new MemoryStream())
     {
         SendMessage(MessageType.Info, "Wczytuję plik '4214456.csv'", false);
         sftp.DownloadFile("/pl-regions/4214456/4214456.csv", ms);
         ms.Position = 0;
         using (StreamReader reader = new StreamReader(ms))
         {
             string header = reader.ReadLine();
             if (header == "Postcode;Branch;BranchID;Area;SortingHubCode;LastModify")
             {
                 while (!reader.EndOfStream)
                 {
                     lncnt++;
                     SendMessage(MessageType.Count, $"Plik: 4214456.csv; Linia: {lncnt}", false);
                     string[] line = reader.ReadLine().Split(';').Select(t => t.Trim('"', '\'')).ToArray();
                     Data.Inpost.SetRoutingCode(line[0], line[1], line[3], line[4], line[5]);
                 }
             }
             else
                 SendMessage(MessageType.Warning, "Nieznany nagłówek", false);
         }
         SendMessage(MessageType.Info, $"Wczytano {lncnt} linii", false);
     }
 }
 catch (Exception ex)
 {
     ret = false;
     SendMessage(MessageType.Error, ex.Message, false);
 }
 finally
 {
     if (sftp != null)
     {
         if (sftp.IsConnected)
             sftp.Disconnect();
         sftp.Dispose();
     }
 }

 return ret;