private void btnSaoLuu_Click(object sender, EventArgs e) { FolderBrowserDialog dlg = new FolderBrowserDialog(); if (dlg.ShowDialog() == DialogResult.OK) { bool isSuccess = HelperDB.BackupDatabase(dlg.SelectedPath); if (isSuccess) { MessageBox.Show("Backup thanh cong"); } else { MessageBox.Show("Backup that bai"); } } }