private void SaveBothKeysButton_Click(object sender, RoutedEventArgs e)
        {
            var privateKeyName = UniqueKeyFileNamePart + "-private_key-" + CommonKeyFileNamePart;
            var publicKeyName  = UniqueKeyFileNamePart + "-public_key-" + CommonKeyFileNamePart;

            RsaManager.WriteKeysToFile(privateKeyName, publicKeyName);

            string message = "Klucze zostały zapisane pod nazwami:\n\n" + privateKeyName + "\n" + publicKeyName;

            MessageBox.Show(message, "Zapisano", MessageBoxButton.OK, MessageBoxImage.Information);
        }
        private void PublicKeySaveAsButton_Click(object sender, RoutedEventArgs e)
        {
            SaveFileDialog SaveAsDialog = new SaveFileDialog();

            SaveAsDialog.Title  = "Zapisz klucz publiczny jako";
            SaveAsDialog.Filter = "Plik tekstowy|*.txt";

            if (SaveAsDialog.ShowDialog() == true)
            {
                RsaManager.WriteKeysToFile(false, SaveAsDialog.FileName);
            }
        }