Kent Boogaart has a very nice example of a collection view that exposes a range of items in its underlying collection.
Source: Kent's Blog
WPF/SL both ship with some commonly-used collection view implementations, but sometimes you need something a little different. In a previous post I showed a custom collection view that can be used to implement virtual paging in Silverlight. In this post I'm going to show you a collection view that exposes a range of items in its underlying collection. This is useful, for example, when you have a larger data set that the user is able to "zoom into".