title: How to prevent closing of combo box when an item is selected
body: <p>I have a ComboBox like the following and would like to prevent it closing when I click the header section (e.g. <strong><em>Administrators</em></strong>).</p>
  
  <p><a href="https://i.stack.imgur.com/pYe8I.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pYe8I.png" alt="enter image description here"></a></p>
  
  <p>I just tried the following code.</p>
  
  <pre><code>private void cmboName_SelectedIndexChanged(object sender, EventArgs e)
      {
          if (cmboName.SelectedIndex == 1)
          {
              cmboName.DroppedDown = true;
              return;
          }
      }
  </code></pre>
  
  <p>But there is a shivering happens; first combo box will be closed and then opens.</p>