using System;
        using System.Collections.Generic;
        using System.ComponentModel;
        using System.Data;
        using System.Drawing;
        using System.Linq;
        using System.Text;
        using System.Threading.Tasks;
        using System.Windows.Forms;
        using System;
        using System.Collections.Generic;
        using System.ComponentModel;
        using System.Data;
        using System.Drawing;
        using System.Linq;
        using System.Text;
        using System.Threading.Tasks;
        using System.Windows.Forms;
    
        namespace _7th_Program_ListboxAddRemove
        {
            public partial class Form1 : Form
            {
            public Form1()
            {
                InitializeComponent();
            }
            private void button1_Click(object sender, EventArgs e)
            {
                listBox1.Items.Add(textBox1.Text);
            }
            private void button2_Click(object sender, EventArgs e)
            {
                listBox1.Items.Remove(textBox1.Text);
            }
            private void button3_Click(object sender, EventArgs e)
            {
                listBox2.Items.Remove(textBox2.Text);
            }
            private void button4_Click(object sender, EventArgs e)
            {
                listBox2.Items.Add(textBox2.Text);
            }
            private void button5_Click(object sender, EventArgs e)
            {
                listBox2.Items.Add(listBox1.Text);
                listBox1.Items.Remove(listBox1.Text);           
            }
            private void button6_Click(object sender, EventArgs e)
            {
                listBox1.Items.Add(listBox2.Text);
                listBox2.Items.Remove(listBox2.Text);            
            }
        }
    }