title: Register directive for controls in App_Code with no namespace
body: <p>I know that if I created a custom control, say MyLabel in App_Code .. </p>
  
  <pre><code>namespace MyNamespace 
  {
    public class MyLabel : Label { .. }
  }</code></pre>
  
  <p>To access this control in my page, I would use this directive .. </p>
  
  <pre><code>&lt;%@ Register tagPrefix="foo" Namespace="MyNamespace" %&gt;</code></pre>
  
  <p>If I did not provide a namespace (MyNamespace), how do I write the Register directive? </p>
  
  <p>Thanks so much.</p>