public static Region DrawLineString(System.Drawing.Graphics g, SharpMap.Geometries.LineString line, System.Drawing.Pen pen, SharpMap.Map map)
        {
            if (line.Vertices.Count > 1)
            {
                System.Drawing.Drawing2D.GraphicsPath gp = new System.Drawing.Drawing2D.GraphicsPath();
                PointF[] points = line.TransformToImage(map);
                gp.AddLines(points);
                g.DrawPath(pen, gp);

                GisSharpBlog.NetTopologySuite.Geometries.Coordinate[] coords = new GisSharpBlog.NetTopologySuite.Geometries.Coordinate[points.Length];
                for (int i = 0; i < points.Length; i++)
                    coords[i] = new GisSharpBlog.NetTopologySuite.Geometries.Coordinate(points[i].X, points[i].Y);

                GisSharpBlog.NetTopologySuite.Geometries.LineString ls = new
                    GisSharpBlog.NetTopologySuite.Geometries.LineString(coords);
                GisSharpBlog.NetTopologySuite.Geometries.Coordinate[] linearRingPoints = new GisSharpBlog.NetTopologySuite.Geometries.Coordinate[5];
                linearRingPoints[0] = new GisSharpBlog.NetTopologySuite.Geometries.Coordinate(0, 0);
                linearRingPoints[1] = new GisSharpBlog.NetTopologySuite.Geometries.Coordinate(map.Size.Width, 0);
                linearRingPoints[2] = new GisSharpBlog.NetTopologySuite.Geometries.Coordinate(map.Size.Width, map.Size.Height);
                linearRingPoints[3] = new GisSharpBlog.NetTopologySuite.Geometries.Coordinate(0, map.Size.Height);
                linearRingPoints[4] = new GisSharpBlog.NetTopologySuite.Geometries.Coordinate(0, 0);
                GisSharpBlog.NetTopologySuite.Geometries.LinearRing ring = new GisSharpBlog.NetTopologySuite.Geometries.LinearRing(linearRingPoints);
                GeoAPI.Geometries.IGeometry geom = ls.Intersection(new GisSharpBlog.NetTopologySuite.Geometries.Polygon(ring));

                System.Drawing.Drawing2D.GraphicsPath gp2 = new System.Drawing.Drawing2D.GraphicsPath();
                Pen p2 = new Pen(Color.Black, pen.Width < 4 ? 4 : pen.Width);

                if (geom is GisSharpBlog.NetTopologySuite.Geometries.LineString)
                {
                    GisSharpBlog.NetTopologySuite.Geometries.LineString lineString = geom as GisSharpBlog.NetTopologySuite.Geometries.LineString;
                    System.Drawing.PointF[] v = new System.Drawing.PointF[lineString.Coordinates.Length];
                    for (int i = 0; i < lineString.Coordinates.Length; i++)
                        v[i] = new PointF((float)lineString.Coordinates[i].X, (float)lineString.Coordinates[i].Y);

                    gp2.AddLines(v);
                }
                if (geom is GisSharpBlog.NetTopologySuite.Geometries.GeometryCollection)
                {
                    GisSharpBlog.NetTopologySuite.Geometries.GeometryCollection geomCollection = geom as GisSharpBlog.NetTopologySuite.Geometries.GeometryCollection;
                    foreach (GisSharpBlog.NetTopologySuite.Geometries.Geometry cGeom in geomCollection)
                    {
                        if (cGeom is GisSharpBlog.NetTopologySuite.Geometries.LineString)
                        {
                            GisSharpBlog.NetTopologySuite.Geometries.LineString lineString = cGeom as GisSharpBlog.NetTopologySuite.Geometries.LineString;
                            System.Drawing.PointF[] v = new System.Drawing.PointF[lineString.Coordinates.Length];
                            for (int i = 0; i < lineString.Coordinates.Length; i++)
                                v[i] = new PointF((float)lineString.Coordinates[i].X, (float)lineString.Coordinates[i].Y);

                            gp2.AddLines(v);
                        }
                    }
                }

                try
                {
                    gp2.Widen(p2);

                    System.Drawing.Region r = new System.Drawing.Region(gp2);
                    return r;
                }
                catch (OutOfMemoryException)
                {
                    return null;
                }
            }

            return null;
        }