What is the best approach to assign Data Context using MVVM?

Question

I was looking for best approach to set data context property. I found three ways

1. Assign data context on View (either on XAML or code behind).

2. As

Answer 1

I personally like this approach because it makes me have to write less code :). It basically uses an IValueConverter to lookup which view to use whenever a wpf control needs to present a ViewModel visually and the IValueConverter sets the datacontext for you. It also shows you how to create a datatemplate that allows you to require WPF to utilize this converter by default, something like this: