Within what development environment is XAML most commonly used?

XAML and .NET: XAML (eXtensible Application Markup Language) is primarily used within the .NET framework for defining user interfaces. Specifically, technologies like:

WPF (Windows Presentation Foundation): Desktop application UIs

Xamarin: Mobile app UIs

XAML in Other Frameworks: While some limited adaptation exists, its core use is tightly coupled with .NET technologies.

References:

XAML Overview (Microsoft Docs): Introductions to XAML emphasizing its use in .NET applications.

WPF Documentation: Tutorials and references specifically mentioning XAML's role in Windows desktop development.