title: Radio buttons Navigation by KeyBoard
body: <p>I have 3 radio buttons on my WinForm.    </p>
  
  <p>I would like to give the user the option to navigate between them also by keyboard.<br>
  Is there a way to enable it?  </p>
  
  <p>I understand I have to use this code:  </p>
  
  <pre><code> if (e.KeyChar==Convert.ToChar(Keys.Down))  
  </code></pre>
  
  <p>But how do I know which single radio button I have to set as checked?  </p>