private void CleanAll()
 {
     RawDataTextField.StringValue        = "";
     CipheredDataTextField.StringValue   = "";
     CipherKeyTextField.StringValue      = "";
     DecipherKeyTextField.StringValue    = "";
     CipheredOutputTextField.StringValue = "";
     RawOutputTextField.StringValue      = "";
     MainTabView.SelectAt(0);
 }
        partial void openText(NSMenuItem sender)
        {
            NSOpenPanel fileDialog = NewOpenFileDialog("Wybierz plik do zaszyfrowania", "txt");

            if (fileDialog.RunModal() == (int)NSModalResponse.OK)
            {
                StreamReader  dataFile = File.OpenText(fileDialog.Url.Path);
                Task <string> dataTask = dataFile.ReadToEndAsync();
                dataTask.Wait();
                RawDataTextField.StringValue = dataTask.Result;
                MainTabView.SelectAt(0);
                dataFile.Close();
            }
        }
 partial void TabChangeButton_Changed(NSObject sender)
 {
     try { MainTabView.SelectAt(TabChangeButton.SelectedSegment); }
     catch (Exception ex) { Error.Report("TabChangeButton_Changed", ex); }
 }