PersonModule.Student.Student C# (CSharp) Method

        public Student(XmlNode xmlNode):base(
            xmlNode.SelectSingleNode("PresonalDetails/FirstName").InnerText,
            xmlNode.SelectSingleNode("PresonalDetails/LastName").InnerText,
            xmlNode.SelectSingleNode("PresonalDetails/EGN").InnerText,
            xmlNode.SelectSingleNode("PresonalDetails/HomeTown").InnerText
            )
        {
            int facultyNumber = int.Parse(xmlNode.SelectSingleNode("FacultyNumber").InnerText);
            StudentRank rank = (StudentRank)Enum.Parse(typeof(StudentRank), xmlNode.SelectSingleNode("Rank").InnerText);
            //int points = int.Parse(xmlNode.SelectSingleNode("Points").InnerText);

            if (facultyNumber == 0)
            {
                throw new ArgumentException("Faculty number cannot be zero");
            }
            this.coursesList = new List<Course>();
            XmlNode coursesNode = xmlNode.SelectSingleNode("CoursesList");
            XmlNode courseNode = coursesNode.FirstChild;
            while (!(courseNode == null))
            {

                
                //Enum.Parse(cName, courseNode.InnerText.ToString());

                object cName = Enum.Parse(typeof(CourseName), courseNode.InnerText.ToString());

                this.AddCourse (new Course((CourseName)cName));
                courseNode = courseNode.NextSibling;
            }

            this.GradeList = new List<Grade>();
            XmlNode gradesNode = xmlNode.SelectSingleNode("GradesList");
            XmlNode gradeNode = gradesNode.FirstChild;
            while (!(gradeNode == null))
            {
                this.AddGrade(new Grade(
                    double.Parse(gradeNode.SelectSingleNode("Weight").InnerText),
                    new Course((CourseName)Enum.Parse(typeof(CourseName), gradeNode.SelectSingleNode("Course").InnerText.ToString()))
                    )
                    );
                gradeNode = gradeNode.NextSibling;
            }

            this.FacultyNumber = facultyNumber;
            this.Rank = rank;
            //this.Points = points;
        }