What is the advantage of setting DataContext in code instead of XAML?

Question

There seem to be two main ways to define DataContext in WPF:

• either in code like this:

App.xaml.cs (taken from the WPF MVVM Too

Answer 1

In my experience, it is best to design an interface layout against at least a sample of the data it will present. To do otherwise is to be blind to cheap insights and expensive oversights.