using System;

using GeoAPI.CoordinateSystems;

using GeoAPI.CoordinateSystems.Transformations;

using ProjNet.CoordinateSystems;

using ProjNet.CoordinateSystems.Transformations;

​

public class Program

{

    public static void Main(string[] args)

    {

        double lat = 54.00;

        double lon = -3.00;

​

        IGeographicCoordinateSystem wgs84 = GeographicCoordinateSystem.WGS84;

        IProjectedCoordinateSystem googleMercatorCS 

           = ProjectedCoordinateSystem.WebMercator;

​

        CoordinateTransformationFactory ctFact = new CoordinateTransformationFactory();

        ICoordinateTransformation transformation

            = ctFact.CreateFromCoordinateSystems(wgs84, googleMercatorCS);

​

        double[] fromPoint = new double[] { lon, lat };

        double[] toPoint = transformation.MathTransform.Transform(fromPoint);

​

        Console.WriteLine("Google Mercator X: "+ toPoint[0]);

        Console.WriteLine("Google Mercator Y: "+ toPoint[1]);

    }

}