//߶εķ
 IPointCollection pPointColl = null;
            pPointCollection = new MultipointClass();
            while (pFeature!=null)
            {
            IPolyline pPolyline = pFeature.Shape as IPolyline;
            pPointColl = makeLinePoint(pPolyline as IGeometry, 10) as IPointCollection;
            pPointCollection.AddPointCollection(pPointColl);
            pFeature = pFeatureCursor.NextFeature();
            }