MVVM / ObservableCollection Question

Question

I have the following XAML:

Answer 1

ObservableCollection knows how to notify if the collection changes i.e. an item is added or removed.

however, if you do the following:

FamilyList = new ObservableCollection(); 
// or
FamilyList = GetFamilyList();

then you are actually changing the property that holds your collection, which is different. I'm guessing this is the issue here.