"XamlCSS lets you style XAML applications with CSS. It combines the lean syntax and the the hierarchy-based styling of CSS with the native styling systems of the 3 major XAML dialects: WPF, UWP and Xamarin.Forms. Key features: - it is concise - lean CSS vs. verbose XML - partical SCSS support - nested selectors, variables,... - you can freely combine styles - more than just having "BaseOn" - styling by semantic words - i.e. "important", "primary", "secondary",... - based on view-hierarchy - support for XAML features - markup-extensions, bindings,... - designer support - see your changes instantaniously in your IDE"