API: Distance Matrix

The Google Maps Distance Matrix API is a service that provides travel distance and time for a matrix of origins and destinations. The information returned is based on the recommended route between start and end points, as calculated by the Google Maps API, and consists of rows containing duration and distance values for each pair.

Example

Let's assume we want to find distance between two points:
Batilly @ 49.171020, 5.969358 and
Aachen @ 50.775346, 6.083887

Create the request:

DistanceMatrixRequest request = new DistanceMatrixRequest()
{
     WaypointsOrigin = new List<Location> { new LatLng(49.171020M, 5.969358M) },
     WaypointsDestination = new List<Location> {new LatLng(54.555393M, 23.362615M) },
     Sensor = false
};

Make the request:

var response = new DistanceMatrixService().GetResponse(request);

Display the results:

Console.WriteLine(response.Rows.First().Elements.First().distance.Text);
Console.WriteLine(response.Rows.First().Elements.First().duration.Text);

It doesn't work anymore, it returns null.

Output:
1,677 km
16 hours 19 mins