<a href="/buffet-lau--nuong-hon-200-mon-an-huong-vi-han-quoc-tai-seoul-garden-hien-dai-nhat-vn-170ecccd214b42f8/dat-mua" id="cmPurchaseLink" name="cmPurchaseLink"></a>
как получить
"/buffet-lau--nuong-hon-200-mon-an-huong-vi-han-quoc-tai-seoul-garden-hien-dai-nhat-vn-170ecccd214b42f8/dat-mua" id="cmPurchaseLink" name="cmPurchaseLink"
с использованием xpath (C #)?