Check the Tap box from the Gesture service for the toolbox.
WP7 Tip of the Day: Silverlight Toolkit: Gestures
<ListBox Height="100" HorizontalAlignment="Left" Margin="12,186,0,0" Name="listBox1" VerticalAlignment="Top" Width="460" >
<Controls:GestureService.GestureListener>
<Controls:GestureListener Tap="GestureListener_Tap">
</Controls:GestureListener>
</Controls:GestureService.GestureListener>
<ListBoxItem Content="1"/>
<ListBoxItem Content="2"/>
<ListBoxItem Content="3"/>
<ListBoxItem Content="4"/>
</ListBox>
and
public void GestureListener_Tap(object sender, GestureEventArgs e) {
System.Diagnostics.Debug.WriteLine("tap");
}
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