WPF Async Pack is a small library for creating asynchronous WPF applications. It's not a framework, it was created mainly for the small applications where installing heavy frameworks is just overkill. It doesn't have any dependencies and contains such the most used classes as AsyncCommand and BaseViewModel.

In C# in order to control what code should be executed we can use compilation directives #if, #else, #elif and #endif. For instance, we can compile certain code only in Debug mode and exclude one in Release.

The question is how to achieve the same in XAML.

For localization or some other reason you might want to access the static resources in ResX file from the XAML using Static extension.