데블스캠프2012/넷째날/묻지마Csharp/Mission2/서영주

        private void pushButton_Click(object sender, EventArgs e)
        {
            MessageBox.Show(sender.ToString() + "\n" + e.ToString());
            label1.Visible = true;

            MessageBox.Show((dateTimePicker1.Value.Year-dateTimePicker2.Value.Year).ToString());
        }