WPF: Binding lists in XAML- how can an item know its position in the list?

Question

Given the following XAML code that with a ListControl like behavior:

Answer 1

According to MSDN Magazine article "Charting with DataTemplates":

[...]the DataTemplate would need access to the index of the particular data item in the collection. But it's easy enough to include this information in the business object[...]

So, unless there was a change in .NET 4, there is no "index of this item" property unless it is explicitly included in the model.