How do I get the code coverage of unit tests created using Silverlight unit tests.

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Silverlight

unit-testing

Hi,
We have a PRISM based MVVM Silverlight application(SL5).
The idea is to create unit tests for the viewmodel and in some places view code.

We explored msTest, nunit and Silverlight unit test framework for the same and reached a conclusion that Silverlight unit test only work with our application.
The questions are:
1. Is Silverlight unit test the best way to go about for PRISM based Silverlight applications?
2. How to get the code coverage for my unit tests in Silverlight Unit test framework?