serial

using Newtonsoft.Json;
using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace serialize
{


    class Player
    {
        public string Name { get; set; }
        public int LvL { get; set; }

        public int Exp;

        string ID { get; }


        public Player()
        {
            ID = generator(30);
            LvL = 1;
        }

        public void ShowInfo()
        {
            Console.WriteLine($"Name - {Name}\nLvL - {LvL}\nExp - {Exp}/{10 * LvL * LvL}\n");
        }
        public void GiveExp(int X)
        {
            Exp += X;
            if (Exp > 10 * LvL * LvL)
            {
                Exp -= 10 * LvL * LvL;
                LvL ++;
                this.GiveExp(0);
            }
        }


        static string generator(int n)
        {
            Random rand = new Random();
            char cur;
            StringBuilder result = new StringBuilder();
            for (int i = 0; i < n; i++)
            {
                cur = (char)('a' + rand.Next(0, 9));
                result.Append(cur);
            }
            return result.ToString();
        }


    }
    class Human
    {
        public string Name { get; set; }
        public int Age { get; set; }
    }

    class Student:Human
    {
        public int Year { get; set; }
    }

    class Worker:Human
    {
        public int Salary { get; set; }
    }

    class Child : Human
    {
        public int Height { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var player1 = new Player { Name = "forest123" };
            var player2 = new Player { Name = "Decibit" };
            var player3 = new Player { Name = "Chistoffer1996" };
            player1.GiveExp(100);
            player2.GiveExp(300);
            player3.GiveExp(1000);

            player1.ShowInfo();
            player2.ShowInfo();
            player3.ShowInfo();


            List<Player> players = new List<Player>();
            players.Add(player1);
            players.Add(player2);
            players.Add(player3);


            Console.WriteLine(new String('=', 25));
            Console.WriteLine();


            using (StreamWriter sw = new StreamWriter("Text.json"))
            {
                sw.WriteLine(JsonConvert.SerializeObject(players));
                Console.WriteLine("Запись выполнена");
            }
            using (StreamReader sr = new StreamReader("Text.json"))
            {
                List<Player> restoredPlayers = JsonConvert.DeserializeObject<List<Player>>(sr.ReadToEnd());
                foreach (var item in restoredPlayers)
                {
                    item.ShowInfo();
                }
            }

        }

    }
}