List

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 WindowsFormsApp17
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnKnap_Click(object sender, EventArgs e)
        {
            List<int> minListe = new List<int>();

            minListe.Add(15);
            minListe.Add(20);
            minListe.Add(55);
            minListe.Remove(20);

            foreach (int element in minListe)
            {
                lstUd.Items.Add(element.ToString());
            }
        }
    }
}