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Element.Location属性用来获取元素的位置，Location可以转化为LocationPoint和LocationCurve,如何这个元素是点，则转化为LocationPoint，如果是直线或者曲线则转化为LocationCurve
Wall w = new Wall(); Curve c=(w.Location as LocationCurve).Curve; Opening o = new Opening(); XYZ p = (o.Location as LocationPoint).Point;
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原文地址：http://www.cnblogs.com/minhost/p/5787343.html
