不要使用 listView1.SelectedItems 而是使用 listView1.CheckedItems 并更改您的 button2_click代码>到:

Instead of using listView1.SelectedItems use listView1.CheckedItems and change your button2_click to:

private void button2_Click(object sender, EventArgs e)
        {
            foreach (ListViewItem i in listView1.CheckedItems)
                listView1.Items.Remove(i);

        }