public void ReadXmlDetails(string xmlFileName)
        {
            StudentData studentData = new StudentData();

            docLoad.Load(xmlFileName);
            XmlNodeList node = docLoad.SelectNodes("//StudentData/StudentInfo");

            res = GetListOfSudentInfo(node);
        }
        private StudentData GetListOfSudentInfo(XmlNodeList node)
        {
            StudentData studentData = new StudentData();

            foreach (XmlNode studInfo in node)
            {
                string      name        = studInfo.SelectSingleNode("StudentName").InnerText;
                StudentInfo refstudInfo = new StudentInfo(name);
                XmlNode     subjects    = studInfo.SelectSingleNode("Subjects");
                var         res         = GetAllMarksOfSubjects(subjects);
                refstudInfo.Add(res);
                studentData.Add(refstudInfo);
            }
            return(studentData);
        }