C#读取xml文件指定节点内容的值

 <AR-PACKAGE>
    <SHORT-NAME>ImplementationDataTypes</SHORT-NAME>
                    <ELEMENTS>
                        <IMPLEMENTATION-DATA-TYPE>
                            <SHORT-NAME>uint8</SHORT-NAME>
                            <CATEGORY>VALUE</CATEGORY>
                            <SW-DATA-DEF-PROPS>
                            <SW-DATA-DEF-PROPS-VARIANTS>
                                <SW-DATA-DEF-PROPS-CONDITIONAL>
                                    <BASE-TYPE-REF DEST="SW-BASE-TYPE">/DataTypes/BaseTypes/uint8</BASE-TYPE-REF>
                                </SW-DATA-DEF-PROPS-CONDITIONAL>
                            </SW-DATA-DEF-PROPS-VARIANTS>
                            </SW-DATA-DEF-PROPS>
                        </IMPLEMENTATION-DATA-TYPE>
        </ELEMENTS>
</AR-PACKAGE>

xml文件结构如上所示，
要求读这个节点的值“/DataTypes/BaseTypes/uint8”

 using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;

namespace Q690338
{
    class Program
    {
        static void Main(string[] args)
        {
            string xml = @"<AR-PACKAGE>
    <SHORT-NAME>ImplementationDataTypes</SHORT-NAME>
                    <ELEMENTS>
                        <IMPLEMENTATION-DATA-TYPE>
                            <SHORT-NAME>uint8</SHORT-NAME>
                            <CATEGORY>VALUE</CATEGORY>
                            <SW-DATA-DEF-PROPS>
                            <SW-DATA-DEF-PROPS-VARIANTS>
                                <SW-DATA-DEF-PROPS-CONDITIONAL>
                                    <BASE-TYPE-REF DEST=""SW-BASE-TYPE"">/DataTypes/BaseTypes/uint8</BASE-TYPE-REF>
                                </SW-DATA-DEF-PROPS-CONDITIONAL>
                            </SW-DATA-DEF-PROPS-VARIANTS>
                            </SW-DATA-DEF-PROPS>
                        </IMPLEMENTATION-DATA-TYPE>
        </ELEMENTS>
</AR-PACKAGE>";
            var doc = XDocument.Parse(xml);
            var query = doc.Element("AR-PACKAGE")
                .Element("ELEMENTS")
                .Elements("IMPLEMENTATION-DATA-TYPE").First()
                .Element("SW-DATA-DEF-PROPS")
                .Elements("SW-DATA-DEF-PROPS-VARIANTS").First()
                .Elements("SW-DATA-DEF-PROPS-CONDITIONAL").First()
                .Element("BASE-TYPE-REF").Value;
            Console.WriteLine(query);

        }
    }
}

问题得到解决的话，麻烦在我的回答的右边点个采纳，谢谢。