Seiseki.cs

class Seiseki
{
    static void Main(string[] args)
    {
        ICampusSquare cs = new CampusSquare.CampusSquare(Console.ReadLine(),Console.ReadLine());
        IEnumerable < IGrade > grades = cs.GetGrades();
        Dictionary<string, int> gradeList = new Dictionary<string, int>();
        foreach(IGrade grade in grades)
        {
            gradeList.Add(grade.Name, grade.GradeNum);
        }

        Console.WriteLine("-------------------成績がいいやつ------------------");
        foreach(KeyValuePair<string, int> grade in gradeList)
        {
            if (grade.Value == gradeList.Values.Max())
                Console.WriteLine(grade.Key);
        }
        Console.WriteLine("--------------------落としたやつ-------------------");
        foreach (KeyValuePair<string, int> grade in gradeList)
        {
            if (grade.Value == gradeList.Values.Min())
                Console.WriteLine(grade.Key);
        }
    }
}