引用库：

代码如下：

using GeoAPI.Geometries;
using NetTopologySuite.Features;
using NetTopologySuite.Geometries;
using NetTopologySuite;
using NetTopologySuite.IO;
using Coordinate = NetTopologySuite.Geometries.Coordinate;
using GeoAPI;
using NetTopologySuite.Operation.Polygonize;
using System.Threading;
using Point = NetTopologySuite.Geometries.Point;
using Polygon = NetTopologySuite.Geometries.Polygon;
using IFoxCAD.Cad;
using NetTopologySuite.Index.Quadtree;
using NetTopologySuite.Index.Strtree;
using NetTopologySuite.Triangulate;
using NetTopologySuite.Operation.Linemerge;
[assembly: CommandClass(typeof(IfoxDemo.NTS自己))]//只允许此类快捷键命令

namespace IfoxDemo
{
    public class NTS自己
    {
        [CommandMethod("xx")]
        public static void shp()
        {

            "ad".Print();
            // 创建一个点对象
            var point = new Point(10, 20);

            // 创建一条线段对象
            var line = new LineString(new[] { new Coordinate(0, 0),
                                new Coordinate(10, 10),
                                new Coordinate(20, 0)
                                });

            // 创建一个多边形对象
            var polygon = new Polygon(new LinearRing(new[] {
                                new Coordinate(0, 0),
                                new Coordinate(0, 10),
                                new Coordinate(10, 10),
                                new Coordinate(10, 0),
                                new Coordinate(0, 0)
                                }));

            // 计算两个几何对象之间的距离
            var distance = point.Distance(line);

            // 计算一个几何对象的缓冲区
            var buffer = polygon.Buffer(0.5);

            // 判断两个几何对象是否相交
            var isIntersect = line.Intersects(polygon);
            // 创建一个包含所有几何对象的边界框
           // var envelope = line.Envelope.Union(polygon.Envelope);
          
            // 创建一个 Quadtree 索引
            var index = new Quadtree<NetTopologySuite.Geometries.Geometry>();
            //index.Insert(line);//有bug
            //index.Insert(polygon);
            // 在索引中查找与一个几何对象相交的对象
            var results = index.Query(line.EnvelopeInternal);



            GeometryFactory geometryFactory = new GeometryFactory();
            // 创建点
            Point point1 = geometryFactory.CreatePoint(new Coordinate(1.0, 1.0));
            Point point2 = geometryFactory.CreatePoint(new Coordinate(2.0, 2.0));

            // 创建线段
            LineString lineString = geometryFactory.CreateLineString(new Coordinate[] {
            new Coordinate(0, 0),
            new Coordinate(1, 1),
            new Coordinate(2, 2)
        });

            // 创建多边形
            Polygon polygon2 = geometryFactory.CreatePolygon(new Coordinate[] {
            new Coordinate(0, 0),
            new Coordinate(0, 1),
            new Coordinate(1, 1),
            new Coordinate(1, 0),
            new Coordinate(0, 0)
        });

            // 生成 Delaunay 三角网
            DelaunayTriangulationBuilder dtb = new DelaunayTriangulationBuilder();
            dtb.SetSites(new MultiPoint(new Point[] { point1, point2 }));
            GeometryCollection triangles = (GeometryCollection)dtb.GetTriangles(geometryFactory);

            // 合并线段
            LineMerger lineMerger = new LineMerger();
            lineMerger.Add(lineString);
            System.Collections.ICollection mergedLines =(System.Collections.ICollection) lineMerger.GetMergedLineStrings();






        }
    }
   



}