Showing a route line for a journey on a Bing Maps control in a WP7 app is relatively easy, especially if you use the WP7Contrib Bing Maps Wrapper service to call out to the Bing Maps RESTful API. It's not quite so easy to remove a route line from the control once displayed. The background to this is in our WP7 app FINDaPAD (you'll need Zune installed) we have a page which shows the route to a property. We offer a driving route and a walking route - if it's walking distance! We don't display these routes together, they are mutually exclusive. When either of the icons is clicked to calculate the route we remove the existing route and display the new route once it has been calculated. The couple of screen shots below show 2 different routes between the same start & end locations depending whether you are driving or walking. Shown below is a quick demo I knocked up to show the problem in more detail. This app displays a driving or walking app between the 2...