Take a look at this blog post:
http://blogs.bing.com/maps/2013/08/05/advance-spatial-queries-using-entity-framework-5/ You can use the Bing Maps REST services to get the points that make up the route line. Once you have this you can use the spatial tools in SQL to buffer this line by
200 meters. In the blog post I mentioned there is a find near route example which pretty much does everything but save the polygon in the database, which should be fairly easy to do.
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Proposed as answer byRicky_BrundrittWednesday, September 3, 2014 1:55 PM
Marked as answer byNagendra PrasasdFriday, September 5, 2014 12:34 PM