HtmlAgilityPack 处理通配的contains

//选择不包含class属性的节点
var result = node.SelectNodes(".//span[not(@class)]");
//选择不包含class和id属性的节点
var result = node.SelectNodes(".//span[not(@class) and not(@id)]");
//选择不包含class="expire"的span
var result = node.SelectNodes(".//span[not(contains(@class,'expire'))]");
//选择包含class="expire"的span
var result = node.SelectNodes(".//span[contains(@class,'expire')]");

doc.DocumentNode.SelectNodes("//input[contains(@id, 'bt')]")
doc.DocumentNode.SelectNodes("//input[contains(@name, '__')]")
doc.DocumentNode.SelectNodes("//input[starts-with(@id, 'tb')]")