This library is a .NET wrapper for the Google Maps API. It will allow you to query Google Maps for geocoding, directions, elevation, or places and will show you results on a static map. The documentation includes more information and code samples. This unofficial library is authored by Maxim Novak and licensed by the OSI BSD-2-Clause license.
In October Google announced pricing for its popular Google Maps API. Though most sites won't hit the free limits, those with a lot of traffic may be scrambling for a solution. That was the case for a New York real estate service, which discovered their bill would be $200,000 - $300,000 per year.