The Windows Presentation Foundation is Developed by Microsoft, the Windows Presentation Foundation (or WPF) is a graphical subsystem for rendering user interfaces in Windows-based applications. WPF, previously known as "Avalon", was initially released as part of .NET Framework 3.0. Rather than relying on the older GDI subsystem, WPF utilizes DirectX. WPF attempts to provide a consistent programming model for building applications and provides a clear separation between the user interface and the business logic. As such, it bears a close resemblance to similar XML-oriented object models, such as those implemented in XUL and SVG.