using System;

using System.Collections.Generic;

using System.Linq;

​

public class Student

{

    public string Name { get; set; } //Creating a class named Student with properties for Name (string) and Grades (List<int>).

    public List<int> Grades { get; set; }

​

    public Student(string name)

    {

        Name = name;

        Grades = new List<int>();

    }

​

    public void AddGrade(int grade) //Implement a method within the Student class named AddGrade that adds a grade to the student's list of grades.

    {

        Grades.Add(grade); // adds a grade to the student's list of grades.

    }

​

    public class GradeAnalyzer

    {

​

        private List<int> grades;

​

        public GradeAnalyzer(List<int> grades)

        {

            this.grades = grades;

        }

        public int GetHighestGrade()

        {

            if (grades.Count == 0)

            {

                throw new InvalidOperationException("No grades available to find the highest grade.");

            }

​

            return grades.Max();

        }

​

        public int GetLowestGrade()

        {

            if (grades.Count == 0)

            {

                throw new InvalidOperationException("No grades available to find the highest grade.");

            }

            return grades.Min();

        }

​

    }

}