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

the 4. way would be a DataTemplate.

i think the best approach is the one which fits best in your current situation.

if i have viewmodel first dynamic scenarios i use datatemplate/contentpresenter or with view first i take your way one and so on...