using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
public class MainClass
{
public static void Main(){
DialogResult result = MessageBox.Show("Close?", "Really quit?",
MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (result == DialogResult.No)
Console.WriteLine("NO");
else{
Console.WriteLine("Yes");
}
}
}
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