title: Win 8.1 SearchBox - binding suggestions
body: <p>We are writing a Windows 8.1 Store App that uses the new SearchBox XAML control. It looks like the only way to get suggestions into the dropdown list as the user types is to use the SearchBoxSuggestionsRequestedEventArgs and get the SearchSuggestionCollection from the event then append the suggestions to that.</p>
  
  <p>We're using Prism for WinRT and want to separate the SearchBox and it's events from the ViewModel that is getting the list of suggestion strings. </p>
  
  <p>I can't find anyway of binding a list of strings to the SearchSuggestionCollection or any way of adding them programatically that doesn't involve using the event args, which is making out unit testing very complex.</p>
  
  <p>Is there a way of binding/adding the suggestions that doesn't involve the event args?</p>