question about ref and out
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/135234/difference-between-ref-and-out-parameters-in-net">Difference between ref and out parameters in .NET</a>  </p>
</blockquote>



<p>in  c# there is keywords <code>ref</code> and <code>out</code> i am interesting what is difference between them? thanks</p>
