C# NTS 获取MuliiLineString中的所有线

/// <summary>/// 获取多段线的所有线/// </summary>/// <param name="ml"></param>/// <returns></returns>public static List<LineString> GetLineStrings(this MultiLineString ml){List<LineString> lineStrings = new List<LineString>();for (int i=0;i< ml.NumGeometries;i++){var m = ml.GetGeometryN(i);if (m is LineString){lineStrings.Add(m as LineString);}else if (m is MultiLineString){var mm = (MultiLineString)m;lineStrings.AddRange(mm.GetLineStrings());}}return lineStrings;}