Access the multiple attributes of XML File with LINQ in C#

Xml File 

StudentInfo.xml

Xml file contains attribute named as Name, USN, Address

LINQ QUERY to fetch particular Student Information:

private List<string> GetStudentDetails(string _usn)

{

  List<string> _lstStudentInfo=new List<string>();

  XmlDocument xdcDocument = new XmlDocument();

  XElement root =XDocument.Load(@"H:\CollegeSeminar\StudentInfo.xml").Root;

  

  var result = root.Elements("Student").

         Where(x => x.Attribute("USN").Value == _studentId).                                
         Select(i => new { Name = i.Attribute("Name").Value,
         StudentAddress = i.Attribute("Address").Value,StudentUSN= i.Attribute("USN").Value }).ToList();

  //To get the values

 _lstStudentInfo.Add(result[0].Name);
_lstStudentInfo.Add(result[0].StudentAddress);
_lstStudentInfo.Add(result[0].StudentUSN);
 return _lstStudentInfo; 

 }