using System;

using System.Collections.Generic;

using System.Linq;

​

    public partial class Program

    {

        public static void Main()

        {

            var subjects = new List<Subject>();

            subjects.Add(new Subject()

            {

                scores = new List<SeasonScore>()

                {

                    new SeasonScore() {value = 1},

                    new SeasonScore() {value = 2},

                    new SeasonScore() {value = 3},

                }

            });

            subjects.Add(new Subject()

            {

                scores = new List<SeasonScore>()

                {

                    new SeasonScore() {value = 4},

                    new SeasonScore() {value = 5},

                    new SeasonScore() {value = 6},

                }

            });

            Console.WriteLine(subjects.Max(s => s.scores.Max(v => v.value)).ToString());

        }

    }

    public class SeasonScore

    {

        public int SeasonScoreID { get; set; }

​

        public string season { get; set; }

​

        public int year { get; set; }

​

        public decimal value { get; set; }

​

        public virtual Subject Subject { get; set; }

    }

​

    public class Subject

    {

        public int SubjectID { get; set; }

​

        public string subject { get; set; }

​

        public virtual List<SeasonScore> scores { get; set; }

​

        public Subject()

        {

            scores = new List<SeasonScore>();

        }

    }

​