using System;
using System.Windows.Forms;
namespace workingframe
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
listBox1.Items.Add("abc");
listBox1.Items.Add("xyz");
}
}
}
/*
run:
abc
xyz
*/