Web Services Contract First: Drop Schema in app_code with a Custom Bui

Web applications in Visual Studio 2005 allow you to drop items in the app_code directory in your project and classes are compiled in the background for you. For instance, drop a WSDL file in there and you get a proxy for the web service, drop a schema and you get a DataSet. I wanted to drop a schema in app_code and get an XML serializable class.