private static void AreEqual(XmlNode polygonNode, Polygon polygon)
{
var lineNodes = polygonNode.SelectNodes("LSG");
var exteriorNode = GetExteriorNode(lineNodes);
var interiorNodes = GetInteriorNodes(lineNodes);
var exteriorRing = polygon.ExteriorRing;
var interiorRings = polygon.InteriorRings;
RingAssert.AreEqual(exteriorNode, exteriorRing);
RingAssert.AreEqual(interiorNodes, interiorRings);
}