title: in C#, Append selection multiple times from 2 ComboBoxes into a TextBox using a button
body: <p>I am trying to append selections from 2 ComboBoxes into a TextBox with a click of a button and I am not sure how to do this. I can do it once with code like this:</p>
  
  <pre><code> private void BTN_APPEND_Click(object sender, EventArgs e)
      {
          TB_CONNECTORS.Text = CB_PORT_NUMBER.Text + " " + CB_CONNECTOR.Text;
      }
  </code></pre>
  
  <p>And this will result in
  <a href="https://i.stack.imgur.com/MsEOS.jpg" rel="nofollow noreferrer">Append with the click of a button</a></p>
  
  <p>but the question is, how can I append to this one more time?</p>