title: how to down cast in c#
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/1339482/typecasting-in-c">Typecasting in C#</a>  </p>
  </blockquote>
  
  
  
  <p>how do I down cast in c#?</p>