private void deleteItem_Click(object sender, EventArgs e)
{
if (menuView.SelectedItems.Count > 0)
{
ListViewItem delItem = menuView.Items[menuView.SelectedItems[0].Index];
RestaurantMenu.removeItemByItemID(delItem.SubItems[0].Text);
delItem.Remove();
itemIDText.Text = "";
itemNameText.Text = "";
itemPriceText.Text = "";
itemCategoryText.Text = "";
}
}