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 Add_Button(object sender, EventArgs e) { listBox1.Items.Add(textBox1.Text); } private void Remove_Button(object sender, EventArgs e) { listBox1.Items.Remove("textBox1.Text); } } }