title: How to search for specific value in Registry keys
body: <p>How can I search for specific value in the registry keys?</p>
  
  <p>For example I want to search for XXX in </p>
  
  <pre><code>HKEY_CLASSES_ROOT\Installer\Products
  </code></pre>
  
  <p>any code sample in C# will be appreciated,</p>
  
  <p>thanks</p>