title: asp.net PlaceHolder usage
body: <p>I found a programmer using a place holder like this</p>
  
  <pre><code>&lt;asp:PlaceHolder ID="placeHolder4" runat="server"&gt;
    &lt;asp:Repeater ID="repeaterSearchBookResults" runat=server&gt;
            &lt;HeaderTemplate&gt;Code  &lt;/HeaderTemplate&gt;
  
  
           &lt;ItemTemplate&gt; Code&lt;/ItemTemplate&gt;
  
          &lt;FooterTemplate&gt; Code &lt;/FooterTemplate&gt;
       &lt;/asp:Repeater&gt;
  &lt;/asp:PlaceHolder&gt;
  </code></pre>
  
  <p>In the code, he did not add any controls, he did nothing except setting visible true to the place holder.</p>
  
  <p>Is there some trick that I should know about place holders, or he is just too lazy to remove the place holder and use panels!!</p>