DialogResult result = MessageBox.Show("数据库清理后不可再恢复，确实要清空数据库吗？", "删除确认", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2, MessageBoxOptions.DefaultDesktopOnly);
if (result.ToString() == "OK")
{
....................
}
if (result.ToString() == "OK")
{
....................
}