private void ContinueButton_Click(object sender, RoutedEventArgs e)
{
SodukoInitInfo sii = new SodukoInitInfo();
sii.RestoreState = true;
Frame.Navigate(typeof(GamePage), sii);
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
_sii = (SodukoInitInfo)e.Parameter;
}