.XBAP File Extension
File TypeXAML Browser Application File
What is an XBAP file?
Internet application file used by XAML Browser Application (XBAP) technology, which allows rich Internet applications to run in Web browsers; contains a compiled program file, similar to an .EXE file but for the Web browser; executed within a sandbox to provide security.
XBAP files can be compiled using Microsoft Visual Studio. They require Microsoft's .NET framework to be installed in order to run. They may be deployed from a Web server or as a standalone application and can be started in Internet Explorer or Firefox.
NOTE: XAML browser applications are Windows Presentation Foundation (WPF) programs that run in the browser.