title: Edit a List<Tuple> item
body: <p>With a <code>List&lt;String&gt;</code> you can edit an item simply with this:</p>
  
  <pre><code>var index = List.FindIndex(s =&gt; s.Number == box.Text);
  List[index] = new String;
  </code></pre>
  
  <p>But, how to apply it on a <code>List&lt;Tuple&lt;string, string&gt;&gt;</code> for example?</p>