C# 使用HtmlAgilitypack从DIV获取href标记时获取“NullPointerException”

下面是我的html代码片段，有N个DIV的类名为

quality

，现在我想提取每个DIV的

，每个DIV的类名为quality

伊斯汀市民艾哈迈达巴德

<div class="quality wrap">
<a href="/Hotel_Review-g297608-d4464287-Reviews-Eastin_Easy_Citizen_Ahmedabad-Ahmedabad_Gujarat.html" id="property_4464287"class="property_title" onclick=" ta.setEvtCookie('Reviews', 'HotelName', 297608, 0, this.href); ta.util.cookie.setPIDCookie(15176);">
Eastin Easy Citizen Ahmedabad</a> </div>

<div class="quality wrap">
<a href="/Hotel_Review-g297608-d4464287-Reviews-Eastin_Easy_Citizen_Ahmedabad-Ahmedabad_Gujarat.html" id="property_4464287"class="property_title" onclick=" ta.setEvtCookie('Reviews', 'HotelName', 297608, 0, this.href); ta.util.cookie.setPIDCookie(15176);">
Eastin Easy Citizen Ahmedabad</a> </div>

<div class="quality wrap">
<a href="/Hotel_Review-g297608-d4464287-Reviews-Eastin_Easy_Citizen_Ahmedabad-Ahmedabad_Gujarat.html" id="property_4464287"class="property_title" onclick=" ta.setEvtCookie('Reviews', 'HotelName', 297608, 0, this.href); ta.util.cookie.setPIDCookie(15176);">
Eastin Easy Citizen Ahmedabad</a> </div>

---

但是我收到了

NullPointerException

有人能帮我吗

应该是质量包装而不是质量包装

"//div[@class='quality wrap']//a"

---

是的

var hrefList=page.DocumentNode
                 .SelectNodes("//div[@class='quality wrap']//a")
                 .Where(e=>e.InnerText.Trim()=="Eastin Easy Citizen Ahmedabad")
                 .Select(x=>x.Attributes["href"].Value)
                 .ToList();

---

你能告诉我如何获得Eastin Easy Citizen Ahmedabad的价值吗？

var hrefList=page.DocumentNode
                 .SelectNodes("//div[@class='quality wrap']//a")
                 .Where(e=>e.InnerText.Trim()=="Eastin Easy Citizen Ahmedabad")
                 .Select(x=>x.Attributes["href"].Value)
                 .ToList();