ASP.NET Master Page & Containers
<p>I have been using ASP.NET MVC for the past few months, after successfully ignoring ASP.NET for years.  I have a (simple) MVC site where I have used a Master Page for the overall look, then, in the content pages, called RenderPartial on subpages with their own Master Pages to give the subcontent a consistent Container style.</p>

<p>I need to shift this site to ASP.NET (not MVC), but can't work out how to mimic this behavior.  If I use the subcontent as User Controls, they don't work through Master Pages, but I can't use them as Pages (they must inherit from UserControl).</p>

<p>Sorry if this is a bit vague, but if anyone thinks they know what I'm after and can help, I'd be grateful.  Thanks.</p>
