Bing Maps with Pushpins in Windows Store Applications

Question

I have a project of finding distance and routing between two places that i have plotted on the map. So, here I want to dynamically pin the pushpins on the map i.e., when the program runs if I tap anywhere on the map then there a pushpin should generate and in the backend the it has to save the location details(latitude and longitude). Like this, I have to pin two pushpins and when ever I click on the button route map should generate in between those locations. So, how can pin the locations dynamically and how can I save those details. This should be done for windows store applications in C#.