<p>I would like to build a web application on Castle MonoRail, I was wondering how can we use an action with extension and another action without extension? How can HTML helper generator url for us?</p>

<p>Ex: </p>

<ul>
<li><a href="http://mysite.com/Products/list" rel="nofollow noreferrer">http://mysite.com/Products/list</a></li>
<li><a href="http://mysite.com/Products/abc.castle" rel="nofollow noreferrer">http://mysite.com/Products/abc.castle</a></li>
</ul>

You can try creating a routing role like
```
```
/<controller>/<action>.castle
```
```
and it would do the trick.