C# Listview不按ctrl shift能多行选择么？

List<ListViewItem> selItems = new List<ListViewItem>();
private void listView1_MouseClick(object sender, MouseEventArgs e)
{          
    Point pt = new Point(e.X, e.Y);
    ListViewItem Item = listView1.GetItemAt(pt.X, pt.Y);
          
    selItems.Add(Item);
    foreach(ListViewItem i in selItems)
    {                
        i.Selected = true;
    }

}