What Does Windows Presentation Foundation Mean?
Windows Presentation Foundation (WPF) is a part of the Windows operating system that provides graphical user interfaces and environments for applications and services tha are developed and executed on Windows OS.
WPF is a subsystem in the Windows OS that appeared in the Windows Vista version. It is also a component of .NET framework 3.0, providing programming tool and technique for graphical development and the authoring of applications.
WPF was formerly known as Avalon.
Techopedia Explains Windows Presentation Foundation
Windows Presentation Foundation primarily provides graphics rendering services for applications developed for the Windows platform. It is integrated within the .NET framework and works by providing runtime libraries, which consist of the programming procedures and APIs that are used by developers to access graphical hardware, memory and programming functions.
WPF provides services such as support for extensible application markup language (XAML), 2-D and 3-D graphics, animation, styles, data binding and other graphical control elements essential for application developers.