MSDN UK Screencasts: How to Use CAS with ASP.NET

This Screencast explains how you can use code access security policy in ASP.NET 2.0 applications to provide a constrained execution environment for running your Web applications and Web services. This technique is designed for scenarios where multiple Web applications are hosted on a shared server and where you need to provide application isolation and restricted access to shared system resources. This Screencast shows you how to use standard policy and also how to customise policy if one of the standard trust levels does not meet your application's precise requirements.