private void HyperlinkButton_Click(object sender, RoutedEventArgs e)
{
var _navigationService = ServiceLocator.Current.GetInstance<INavigationService>();
var hyperlinkButton = e.OriginalSource as ContextDataButton;
if (hyperlinkButton != null)
{
_navigationService.NavigateToExternalUri(new Uri((string)hyperlinkButton.ContextData));
}
}