using System;

using System.Collections.Generic;

​

public class StudentRecord : IComparable<StudentRecord>

{

    public Dictionary<string, string> coursehistory = new Dictionary<string, string>();

    public string name;

    public StudentRecord(string pname)

    {

        pname = name;

    }

​

    private string grade;

    private string coursename;

    public double CalGPA()

    {

        double totalscore = 0;

        int count = 0;

        foreach (KeyValuePair<string, string> pair in coursehistory)

        {

            if (pair.Value == "A")

                totalscore = totalscore + 4;

            else if (pair.Value == "B")

                totalscore = totalscore + 3.3;

            else if (pair.Value == "C")

                totalscore = totalscore + 2.7;

            else //F

                totalscore = totalscore + 0;

            count++;

        }

​

        return totalscore / count;

    }

​

    // sort by id comparison

    public int CompareTo(StudentRecord b)

    {

        if (CalGPA() > b.)

}

​

public class Program

{

    public static void Main()

    {

    }

}