title: How to read name of a registry key
body: <p>something like this :- </p>
  
  <pre><code>Microsoft.Win32.RegistryKey key;
  key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\\15.0\Outlook\\Preferences");
  String GetRegistryValue = (String)key.GetValue("MaximumAttachmentSize").ToString();
  </code></pre>