The .NET Framework is a development and execution environment that allows different programming languages and libraries to work together seamlessly to create Windows-based applications that are easier to build, manage, deploy, and integrate with other networked systems. Built on Web service standards, .NET enables both new and existing personal and business applications to connect with software and services across platforms, applications, and programming languages. These connections give users access to key information, whenever and wherever you need it. Microsoft .NET–connected software makes the "real-time" enterprise real by enabling information to flow freely throughout the organization, accessible to business partners, and delivering value to customers. With .NET-connected software, users can increase the value of existing systems and seamlessly The .Net Framework 3.5 Window Presentation Foundation [WPF] Windows Presentation Foundation (WPF) provides a unified framework for building applications and high-fidelity experiences in Windows Vista that blend together application UI, documents, and media content, while exploiting the full power of the computer. Use a single WPF programming model to write code once and deploy it as a standalone installed application or in a browser.