gis二次开发，这段代码是对图行的点进行删除，要求以这段代码为基础实习数据更新？？？

private void 修改几何数据ToolStripMenuItem_Click(object sender, EventArgs e)
{
IFeatureLayer pLyr = axMapControl1.get_Layer(0) as IFeatureLayer;
IDataset pDataSet = pLyr.FeatureClass as IDataset;
IWorkspace pWks = pDataSet.Workspace;
IWorkspaceEdit pWksEdit = pWks as IWorkspaceEdit;
pWksEdit.StartEditing(false);
pWksEdit.StartEditOperation();
IFeature pFea = pLyr.FeatureClass.GetFeature(1);
IPolygon p = pFea.Shape as IPolygon;
IPointCollection pc = p as IPointCollection;
pc.RemovePoints(0, 5);
IPolygon newPoly = pc as IPolygon;
pFea.Shape = newPoly;
pFea.Store();
pWksEdit.StopEditing(true);
axMapControl1.Refresh();

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