System.Xml.Linq.XElement'不包含'XPathEvaluate的定义

Question

I'm trying to query an Xelement value passed in through model data and I'm getting the following error

var hello1 = (string)this.Model.hello.XPathEvaluate("/hello/helloworld]");

Namespaces in web.config:

<namespaces>
    <add namespace="System.Web.Mvc" />
    <add namespace="System.Web.Mvc.Ajax" />
    <add namespace="System.Web.Mvc.Html" />
    <add namespace="System.Web.Routing" />
    <add namespace="System.Xml.Linq" />
    <add namespace="System.Xml.XPath"/>
</namespaces>

Answer 1

I ended up removing the references from the config file and added it it directly to the page, @using System.Xml.Linq; @using System.Xml.XPath;