title: ASP.NET/SharePoint master page issue
body: <p>I am using SharePoint Server 2007 + C# + .Net 3.5 + VSTS 2008 + ASP.Net. And I am using collaboration portal template.</p>
  
  <p>I am developing a custom aspx page and put it in _layout folder of a site and I want to apply default.master of the SharePoint site to this aspx page. Any samples about how to achieve this goal?</p>