How I can create a class with array

public class Player
{
    public int ID { get; set; }
    public string Name { get; set; }
    public int Height { get; set; }
    public int Weight { get; set; }
}

public class Players
{
    public double AvgWeight
    {
        get
        {
            List<Player> flat = this.Flatten(this.ThePlayers).ToList();
            return Math.Round(flat.Average(x=>x.Weight), 1);
        }
    }
    public double AvgHeight
    {
        get
        {
            List<Player> flat = this.Flatten(this.ThePlayers).ToList();
            return Math.Round(flat.Average(x=>x.Height),1);
        }
    }
    public string Tallest
    {
        get
        {
            List<Player> flat = this.Flatten(this.ThePlayers).ToList();
            Player player = flat.FirstOrDefault(x=>x.Height == flat.Max(y=>y.Height));
            return string.Format("Tallest player: {0} {1}", player.ID, player.Name);
        }
    }

    public string Heaviest
    {
        get
        {
            List<Player> flat = this.Flatten(this.ThePlayers).ToList();
            Player player = flat.FirstOrDefault(x=>x.Weight == flat.Max(y=>y.Weight));
            return string.Format("Tallest player: {0} {1}", player.ID, player.Name);
        }
    }

    public int RandomWeight()
    {
        return random.Next(63,80);
    }

    public int RandomHeight()
    {
        return random.Next(155,180);
    }

    public IEnumerable<T> Flatten<T>(T[,] map) 
    {
        for (int row = 0; row < map.GetLength(0); row++) 
        {
            for (int col = 0; col < map.GetLength(1); col++) 
            {
                yield return map[row,col];
            }
        }
    }

    private Player[,] ThePlayers = null;

    Random random = new Random();

    public Players()
    {
        this.ThePlayers = new Player[4,6]
        {
            { 
                new Player(){ID=101, Height=RandomHeight(), Name="Adam", Weight=random.Next(63,80)},
                new Player(){ID=102, Height=RandomHeight(), Name="Zach", Weight=random.Next(63,80)},
                new Player(){ID=103, Height=RandomHeight(), Name="Andy", Weight=random.Next(63,80)},
                new Player(){ID=104, Height=RandomHeight(), Name="Bob", Weight=random.Next(63,80)},
                new Player(){ID=105, Height=RandomHeight(), Name="Sam", Weight=random.Next(63,80)},
                new Player(){ID=106, Height=RandomHeight(), Name="John", Weight=random.Next(63,80)}
            },
            { 
                new Player(){ID=107, Height=random.Next(155,180), Name="Pradeep", Weight=random.Next(63,80)},
                new Player(){ID=108, Height=random.Next(155,180), Name="Panda", Weight=random.Next(63,80)},
                new Player(){ID=109, Height=random.Next(155,180), Name="Deepak", Weight=random.Next(63,80)},
                new Player(){ID=110, Height=random.Next(155,180), Name="Reetard", Weight=random.Next(63,80)},
                new Player(){ID=111, Height=random.Next(155,180), Name="Dumass", Weight=random.Next(63,80)},
                new Player(){ID=112, Height=random.Next(155,180), Name="Skinflute", Weight=random.Next(63,80)}
            },
            { 
                new Player(){ID=113, Height=random.Next(155,180), Name="Analpore", Weight=random.Next(63,80)},
                new Player(){ID=114, Height=random.Next(155,180), Name="Sumyunguy", Weight=random.Next(63,80)},
                new Player(){ID=115, Height=random.Next(155,180), Name="Tittiefreak", Weight=random.Next(63,80)},
                new Player(){ID=116, Height=random.Next(155,180), Name="Carpetmuncher", Weight=random.Next(63,80)},
                new Player(){ID=117, Height=random.Next(155,180), Name="Dickwad", Weight=random.Next(63,80)},
                new Player(){ID=118, Height=random.Next(155,180), Name="Numnuts", Weight=random.Next(63,80)}
            },
            { 
                new Player(){ID=119, Height=random.Next(155,180), Name="Asspilot", Weight=random.Next(63,80)},
                new Player(){ID=120, Height=random.Next(155,180), Name="Budonkidonks", Weight=random.Next(63,80)},
                new Player(){ID=121, Height=random.Next(155,180), Name="Lactator", Weight=random.Next(63,80)},
                new Player(){ID=122, Height=random.Next(155,180), Name="Loverope", Weight=random.Next(63,80)},
                new Player(){ID=123, Height=random.Next(155,180), Name="Pearlchin", Weight=random.Next(63,80)},
                new Player(){ID=124, Height=random.Next(155,180), Name="Bukake", Weight=random.Next(63,80)}
            }

        };
    }

    public List<Player> GetUnderWeight(int weight)
    {
        List<Player> players = this.Flatten(this.ThePlayers).Where(x=>x.Weight < 70).ToList();
        return players;
    }

}

class Program
{
    static void Main(string[] args)
    {
        Players players = new Players();
        double avgHeight = players.AvgHeight;
        double avgWeight = players.AvgWeight;
        string giant = players.Tallest;
        string tubbo = players.Heaviest;
        List<Player> wimps = players.GetUnderWeight(70);
    }
}