public static class GeoConverter
    {
        private static ICoordinateSystem _epsg3785;

        public static ICoordinateSystem epsg3785
        {
            get
            {
                if (_epsg3785 == null)
                {
                    var cf = new CoordinateSystemFactory();

                    _epsg3785 = cf.CreateFromWkt("PROJCS[\"WGS84 / Google Mercator\", " +
                                                 "  GEOGCS[\"WGS 84\", " +
                                                 "    DATUM[\"World Geodetic System 1984\", " +
                                                 "      SPHEROID[\"WGS 84\", 6378137.0, 298.257223563, AUTHORITY[\"EPSG\",\"7030\"]], " +
                                                 "      AUTHORITY[\"EPSG\",\"6326\"]], " +
                                                 "    PRIMEM[\"Greenwich\", 0.0, AUTHORITY[\"EPSG\",\"8901\"]], " +
                                                 "    UNIT[\"degree\", 0.017453292519943295], " +
                                                 "    AXIS[\"Longitude\", EAST], " +
                                                 "    AXIS[\"Latitude\", NORTH], " +
                                                 "    AUTHORITY[\"EPSG\",\"4326\"]], " +
                                                 "  PROJECTION[\"Mercator_1SP\"], " +
                                                 "  PARAMETER[\"semi_minor\", 6378137.0], " +
                                                 "  PARAMETER[\"latitude_of_origin\", 0.0], " +
                                                 "  PARAMETER[\"central_meridian\", 0.0], " +
                                                 "  PARAMETER[\"scale_factor\", 1.0], " +
                                                 "  PARAMETER[\"false_easting\", 0.0], " +
                                                 "  PARAMETER[\"false_northing\", 0.0], " +
                                                 "  UNIT[\"m\", 1.0], " +
                                                 "  AXIS[\"x\", EAST], " +
                                                 "  AXIS[\"y\", NORTH], " +
                                                 "  AUTHORITY[\"EPSG\",\"900913\"]]");

                }

                return _epsg3785;
            }
        }

        public static double[] formWGS84toEPSG3785(double[] coordinates)
        {
            var converter = new CoordinateTransformationFactory().CreateFromCoordinateSystems(GeographicCoordinateSystem.WGS84, epsg3785);
            return converter.MathTransform.Transform(coordinates);
        }

        public static double[] formEPSG3785toWGS84(double[] coordinates)
        {
            var converter = new CoordinateTransformationFactory().CreateFromCoordinateSystems(epsg3785, GeographicCoordinateSystem.WGS84);
            return converter.MathTransform.Transform(coordinates);
        }

        public static string ConvertWKT(string wkt, string convertType)
        {
            var reExp = new Regex(@"([0-9]+\.[0-9]+) ([0-9]+\.[0-9]+)");
            var matches = reExp.Matches(wkt);

            var points = new Dictionary<string, double[]>();

            foreach (var match in matches)
            {
                var coord = new double[0];
                var coord1 = double.Parse((match as Match).Groups[1].ToString(), CultureInfo.InvariantCulture);
                var coord2 = double.Parse((match as Match).Groups[2].ToString(), CultureInfo.InvariantCulture);
                if (convertType == "formEPSG3785toWGS84")
                {
                    coord = formEPSG3785toWGS84(new double[] { coord1, coord2 });
                }

                if (convertType == "formWGS84toEPSG3785")
                {
                    coord = formWGS84toEPSG3785(new double[] { coord1, coord2 });
                }

                var oldCoords = (match as Match).Groups[0].ToString();
                if (!points.ContainsKey(oldCoords))
                {
                    points.Add(oldCoords, coord);
                }
            }

            foreach (var doublese in points)
            {
                wkt = wkt.Replace(doublese.Key, doublese.Value[0].ToString(CultureInfo.InvariantCulture) + " " + doublese.Value[0].ToString(CultureInfo.InvariantCulture));
            }

            return wkt;
        }
    }