Sample Download : http://code.msdn.microsoft.com/CSWP8CollectionViewSource-41c362bf
This sample demonstrates how to perform data binding with CollectionViewSource in Windows Phone 8. When bound to collection, users frequently have to display its subset by applying a filter. Filtering can be done by using several techniques. The current MVVM sample for WP uses LINQ to filter the Collection of the ViewModel to use as the View’s DataContext. This is not always the best approach. For example, if two or more views concurrently obtain data by using LINQ, the UI may not update in a timely manner when the data changes. You can solve this problem by using CollectionViewSource.
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