title: How prevent duplicate items listView C#
body: <p>I am using <code>Windows Forms</code>. With this code I add items to <code>listView</code> from <code>comboBox</code>.</p>
  
  <pre><code>ListViewItem lvi = new ListViewItem();
  lvi.Text = comboBox1.Text;
  lvi.SubItems.Add("");
  lvi.SubItems.Add("");
  lvi.SubItems.Add("");
  lvi.SubItems.Add("")
  
  if (!listView1.Items.Contains(lvi))
  {
      listView1.Items.Add(lvi);
  }
  </code></pre>
  
  <p>I need prevent duplicate items but not work, How Can I solve this?</p>