is there WPF XAML regions?

Question

When I have some blocks I want to collapse like that:

<region 123>
</region>

is there something like that?

Answer 1

have a look at this. it is VS 2010 extension. http://visualstudiogallery.msdn.microsoft.com/3c534623-bb05-417f-afc0-c9e26bf0e177