title: How can I override TryParse?
body: <p>I would like to override <code>bool</code>'s <code>TryParse</code> method to accept "yes" and "no." I know the method I want to use (below) but I don't know how to override <code>bool</code>'s method.</p>
  
  <pre><code>... bool TryParse(string value, out bool result)
  {
      if (value == "yes")
      {
          result = true;
          return true;
      }
      else if (value == "no")
      {
          result = false;
          return true;
      }
      else
      {
          return bool.TryParse(value, result);
      }
  }
  </code></pre>