async private void btnGo_Click(object sender, RoutedEventArgs e)
        {
            bool parsed = true;
            long nbDocs;
            int nbFilesPerFolder, nbFoldersPerFolder;
            parsed &= long.TryParse(txtNbDocs.Text, out nbDocs);
            parsed &= int.TryParse(txtFilesPerFolder.Text, out nbFilesPerFolder);
            parsed &= int.TryParse(txtFoldersPerFolder.Text, out nbFoldersPerFolder);

            if (!parsed)
            {
                System.Windows.MessageBox.Show(this, "Error while parsing values : check your string formats", "Word Generation", MessageBoxButton.OK, MessageBoxImage.Error);
            }
            else
            {
                var gen = new DocGeneration();
                gen.Progress += Gen_Progress;
                btnGo.IsEnabled = false;

                _sw = Stopwatch.StartNew();
                await gen.Generate(nbDocs, txtGenerationFolder.Text, nbFilesPerFolder, nbFoldersPerFolder, (int)sldParaPerDoc.Value, (int)sldWordsPerPara.Value);
                pbProgress.Value = 100;
                btnGo.IsEnabled = true;
                Process.Start(txtGenerationFolder.Text);
                System.Windows.MessageBox.Show(this, $"{nbDocs} documents generated in {_sw.ElapsedMilliseconds} ms", "Word Generation", MessageBoxButton.OK, MessageBoxImage.Information);
            }
        }
        async private void btnGo_Click(object sender, RoutedEventArgs e)
        {
            bool parsed = true;
            long nbDocs;
            int  nbFilesPerFolder, nbFoldersPerFolder;

            parsed &= long.TryParse(txtNbDocs.Text, out nbDocs);
            parsed &= int.TryParse(txtFilesPerFolder.Text, out nbFilesPerFolder);
            parsed &= int.TryParse(txtFoldersPerFolder.Text, out nbFoldersPerFolder);

            if (!parsed)
            {
                System.Windows.MessageBox.Show(this, "Error while parsing values : check your string formats", "Word Generation", MessageBoxButton.OK, MessageBoxImage.Error);
            }
            else
            {
                var gen = new DocGeneration();
                gen.Progress   += Gen_Progress;
                btnGo.IsEnabled = false;

                _sw = Stopwatch.StartNew();
                await gen.Generate(nbDocs, txtGenerationFolder.Text, nbFilesPerFolder, nbFoldersPerFolder, (int)sldParaPerDoc.Value, (int)sldWordsPerPara.Value);

                pbProgress.Value = 100;
                btnGo.IsEnabled  = true;
                Process.Start(txtGenerationFolder.Text);
                System.Windows.MessageBox.Show(this, $"{nbDocs} documents generated in {_sw.ElapsedMilliseconds} ms", "Word Generation", MessageBoxButton.OK, MessageBoxImage.Information);
            }
        }