.NET Library for Google Maps API support

.NET wrapper libraries for the Google Maps API :

1. GoogleApi
2. google-maps

gmaps-api-net is outdated (at this time of answering) - the last update for the Directions API was made in 2016.

Usage example for GoogleApi:

using GoogleApi.Entities.Common;
using GoogleApi.Entities.Maps.Directions.Request;
using GoogleApi.Entities.Maps.Directions.Response;

public void GetRoute()
{
    DirectionsRequest request = new DirectionsRequest();    

    request.Key = "AIzaSyAJgBs8LYok3rt15rZUg4aUxYIAYyFzNcw";

    request.Origin = new Location("Brasov");
    request.Destination = new Location("Merghindeal");

    var response = GoogleApi.GoogleMaps.Directions.Query(request);

    Console.WriteLine(response.Routes.First().Legs.First().DurationInTraffic);
    Console.WriteLine(response.Routes.First().Legs.First().Distance);
    Console.WriteLine(response.Routes.First().Legs.First().Steps);
}

This API is still in development but may provide you with what you are looking for:

http://code.google.com/p/gmaps-api-net/