AE中知道图层删除图层内容

//已知图层
IFeatureLayer pFeatureLayer = this._application.MapControl2D.Map.get_Layer(0) as IFeatureLayer;
            IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
            if (pFeatureClass.FeatureCount(null) > 0)
            {
                for (int i = 0; i < pFeatureClass.FeatureCount(null); i++)
                {
                    IFeature pFeature = pFeatureClass.GetFeature(i);
                    pFeature.Delete();
                }
            }