I am using this code to pass values in my Windows 8 app.
The following code passes data to a page when an item is clicked, So it passes sectorId to the Quiz page.
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Passing data between pages is usually done using the query-string (GET) or by using a form (POST). You cannot really pass a complex object between pages, unless you serialize it to a string first and then use the before mentioned methods (GET/POST), but that's not recommended due to length restrictions.
However, you can use the session state and/or the application state to store complex objects (as long as they are serializable) and use them across different requests.