How to zoom this picture on scroller on windows phone 8.1

[thienhoang72]

Here below code: Some people tell me use toolkit:gesture listener but it's not working on windows phone 8.1

<ListView Name="lst_img">
<ListView.ItemTemplate>
<DataTemplate>
<Image Name="img_intro" Source="{Binding link}" DoubleTapped="Image_DoubleTapped">

</Image>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>