Edit

using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication4
{
    public partial class Edit : Form
    {
        public List<Item> itemList = new List<Item>();

        public Edit(List<Item> i)
        {
            itemList = i;
            InitializeComponent();
        }

        private void Edit_Load(object sender, EventArgs e)
        {
            foreach (Item i in itemList)
            {
                itemListBox.Items.Add(i);
            }
        }
    }
}