Sure this a "quick fix". I am assuming AllStations is your LongListSelector. So find the code for it in XAML.
OR
Go to proprities windows, and click on event handlers (it has a lightning icon). Scroll down to SelectionChanged even, and double click on the textbox. It will create an event handler in the code. it will look something like this.
private void AllStations_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
//your logic
}
}
Now you can handle the event. So all you have to do when you test on your emulator or device, is to just tap on the item.