C#+MO实现一个道路编辑软件（刚开始）

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//******主窗口程序

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace IRND_DPT
{
    public partial class frmMain : Form
    {
        IRND_DPT.layerVariable pubLayerVariable = new layerVariable ();
        public frmMain()
        {
            InitializeComponent();
        }
        //添加图层
        private void tlbAddLayer_Click(object sender, EventArgs e)
        {
            IRND_DPT.OpenFile AddFile = new OpenFile();
            AddFile.OpenShapeFiles(CD1,axMap1 );

            object refMap = (object)this.axMap1;
            bool refTrue = true;
            short refShort = 0;
            axlegend1.setMapSource(ref refMap);
            axlegend1.ShowAllLegend();
            axlegend1.LoadLegend(ref refTrue);
            axlegend1.set_Active(ref refShort, true);
            axMap1.Refresh();
            axlegend1.Refresh();

            //AddFile(CD1, axMap1);
        }
        //删除图层
        private void toolStripButton4_Click(object sender, EventArgs e)
        {
            if (pubLayerVariable.MapLayerIndex >= 0)
            {
                for (int i = 0; i <= axMap1.Layers.Count - 1; i++)
                {
                    axMap1.Layers.Remove(pubLayerVariable.MapLayerIndex);
                    break;
                }
                bool refTrue = true;
                axMap1.Refresh();
                axlegend1.LoadLegend(ref refTrue);
            }

        }
        private void axlegend1_AfterSetLayerVisible(object sender,AxSampleLegendControl.__legend_AfterSetLayerVisibleEvent e)
        {
            axMap1.Refresh();            
        }

        private void axlegend1_LayerDblClick(object sender, AxSampleLegendControl.__legend_LayerDblClickEvent e)
        {

        }

        private void axlegend1_MouseDownEvent(object sender, AxSampleLegendControl.__legend_MouseDownEvent e)
        {

            if (e.index >= 0)
            {
                MapObjects2.MapLayer layer= (MapObjects2.MapLayer )axMap1.Layers.Item(e.index );
                pubLayerVariable.MapLayerName = layer.Name;
                pubLayerVariable.MapLayerIndex = e.index;                
            }
            axMap1.TrackingLayer.Refresh(true, axMap1.Extent);
        }
        //放大
        private void tlb_ZoomIn_Click(object sender, EventArgs e)
        {
            axMap1.MousePointer = MapObjects2.MousePointerConstants.moZoomIn;
        }
        //缩小
        private void tlb_ZoomOut_Click(object sender, EventArgs e)
        {
            axMap1.MousePointer = MapObjects2.MousePointerConstants.moZoomOut;
        }
        //漫游
        private void tlb_Pan_Click(object sender, EventArgs e)
        {
            axMap1.MousePointer = MapObjects2.MousePointerConstants.moPan;
        }
        //全图
        private void tbl_Full_Click(object sender, EventArgs e)