using System;
namespace WinFormsApp1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
DialogResult dialogResult = MessageBox.Show("Your Message", "Your Title", MessageBoxButtons.YesNo);
if (dialogResult == DialogResult.Yes) {
label1.Text = "Yes";
}
else if (dialogResult == DialogResult.No) {
label1.Text = "No";
}
}
}
}