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SampleWpfApplication

Turn WPF binding errors into exceptions

This project demonstrates how to use BindingExceptionThrower in a WPF application.

I deliberately inserted an invalid binding in MainWindow.xaml. Indeed {Binding BadBinding} refers to a property that doesn't exist in class ViewModel.

If you run this program without further changes, it will run, and the binding will silently fail. It is the default behavior of a binding in a WPF application.

However, in some applications, you do want to throw an exception if a binding is wrong (in particular, in a unit test project).

To do that, you just need to add this call (I did it in App.xaml.cs):

BindingExceptionThrower.Attach();

Thanks to that single line, every WPF binding error will cause an exception at runtime.

Exception show in Visual Studio