Universal Windows® Apps with XAML and C# Unleashed

Markup Extensions

Markup extensions, like type converters, extend the expressiveness of XAML. Both can evaluate a string attribute value at runtime and produce an appropriate object based on the string. As with type converters, you cannot currently create your own for universal apps, but several markup extensions are built in.

Unlike type converters, markup extensions are invoked from XAML with explicit and consistent syntax. Whenever an attribute value is enclosed in curly braces ({}), the XAML parser treats it as a markup extension value rather than a literal string or something that needs to be type-converted. The following Button uses two different markup extensions as the values for two different properties:

The first identifier in each ...