How to use virtual path providers to dynamically load and compile content from virtual paths in 

Virtual Path Providers are a new feature in ASP.NET 2.0 that can be used to create applications similar to Microsoft SharePoint Portal Server, where the content is stored in a database instead of on the physical file system.

在前面的blog里，提到的Nikhil的一个Content management system, 里面就实现了一个自定义的Virtual path provider。