Are there good patterns for disposing view models when navigating back to a view?

Question

In Silverlight for Windows Phone I have several view models that are disposable and perform necessary cleanup, like event unsubscribing from longer-living services, in Dispose().

When I navigate back in the view stack and the most recent view model have done its deed to completion, I need to call Dispose() on it.

What good patterns of doing this in a structured way are there?

Answer 1

You could make a Blend Behavior or attached property that listens for the Unloaded event , and then calls Dispose() on the DataContext of the object if it's IDisposable . This could then be attached to your Views as appropriate.