The document provides an introduction to Microsoft .Net Framework 3.x and what's new in .Net 3.0 from a developer's perspective. It discusses new technologies like Windows Presentation Foundation (WPF), Windows Communication Foundation (WCF), Windows Workflow Foundation (WF), and Cardspace. It also introduces Extensible Application Markup Language (XAML) and covers new features in programming models, graphics, animation, and media. The document concludes with a demonstration of Silverlight and how it enables rich interactive applications and media experiences on the web.