public static void Main(string[] args)
 {
     try
     {
         /* -------------------------------------------------------------------- */
         /*      Initialize srs                                                  */
         /* -------------------------------------------------------------------- */
         SpatialReference src = new SpatialReference("");
         src.ImportFromProj4("+proj=latlong +datum=WGS84 +no_defs");
         Console.WriteLine( "SOURCE IsGeographic:" + src.IsGeographic() + " IsProjected:" + src.IsProjected() );
         SpatialReference dst = new SpatialReference("");
         dst.ImportFromProj4("+proj=somerc +lat_0=47.14439372222222 +lon_0=19.04857177777778 +x_0=650000 +y_0=200000 +ellps=GRS67 +units=m +no_defs");
         Console.WriteLine( "DEST IsGeographic:" + dst.IsGeographic() + " IsProjected:" + dst.IsProjected() );
         /* -------------------------------------------------------------------- */
         /*      making the transform                                            */
         /* -------------------------------------------------------------------- */
         CoordinateTransformation ct = new CoordinateTransformation(src, dst);
         double[] p = new double[3];
         p[0] = 19; p[1] = 47; p[2] = 0;
         ct.TransformPoint(p);
         Console.WriteLine("x:" + p[0] + " y:" + p[1] + " z:" + p[2]);
         ct.TransformPoint(p, 19.2, 47.5, 0);
         Console.WriteLine("x:" + p[0] + " y:" + p[1] + " z:" + p[2]);
     }
     catch (Exception e)
     {
         Console.WriteLine("Error occurred: " + e.Message);
         System.Environment.Exit(-1);
     }
 }
        /// <summary>
        /// Simple coordinate reprojection
        /// </summary>
        /// <param name="EpsgIn"></param>
        /// <param name="EpsgOut"></param>
        /// <returns></returns>
        public static double[] ReprojectCoordinates(int EpsgIn, int EpsgOut, double x, double y, double z)
        {
            var src = new OSGeo.OSR.SpatialReference(EPSG2WKT(EpsgIn));

            logger.Trace($"SOURCE IsGeographic:" + src.IsGeographic() + " IsProjected:" + src.IsProjected());
            var dst = new OSGeo.OSR.SpatialReference(EPSG2WKT(EpsgOut));

            logger.Trace("DEST IsGeographic:" + dst.IsGeographic() + " IsProjected:" + dst.IsProjected());
            var ct = new OSGeo.OSR.CoordinateTransformation(src, dst);

            double[] p = new double[] { x, y, z };
            logger.Trace("From: x:" + p[0] + " y:" + p[1] + " z:" + p[2]);
            ct.TransformPoint(p);
            logger.Trace("To: x:" + p[0] + " y:" + p[1] + " z:" + p[2]);
            return(p);
        }