my project

using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using static System.Console;

/*#49
Создать приложение для учета данных автосалона, в котором есть следующие элементы:
1. Автомобиль со следующими атрибутами: высота, стоимость, мощность двигателя, длина, название, модель, дата последнего тех. обслуживания, год выпуска, тип привода, цвет.
2. Автосалон со следующими атрибутами: прибыль, название, дата открытия, класс.
3. Рабочий со следующими атрибутами: зарплата, премия, отчество, имя, email, фамилия, дата приема на работу, дата рождения, должность.
Также приложение должно реализовывать следующий функционал:
1. Самый старый магазин это ...
2. Вывести список автомобилей, где <тип_кпп> равняется Х
3. Реализовать автоматическое заполнение данными для автомобиля*/

namespace BaseAvtosalon
{
    class Program
    {
        static List<Employee> CEmployee = new List<Employee> { }; // Список подчиненных
        static List<Saloon> CSaloon = new List<Saloon> { }; // Список салонов
        static List<Auto> CAuto = new List<Auto> { };

        public static int CLC = 0; // slaoon - счётчик для динамического создания экземпляров класса Cheifs
        public static int ELC = 0; // Employees Lisc Counter - счётчик для динамического создания экземпляров класса Employees
        public static int ALC = 0; // auto
        class Employee
        {
            private int _Age;
            private int _Salary;
            private int _Premia;
            private string _Name;
            private string _Surname;
            private string _Thirdname;
            private string _Dr;
            private string _Dataraboty;
            private string _Department;

            public string Name
            {
                get { return _Name; }
                set
                {
                    _Name = value;
                }
            }
            public string Surname
            {
                get { return _Surname; }
                set
                {
                    _Surname = value;
                }
            }
            public string Thirdname
            {
                get { return _Thirdname; }
                set
                {
                    _Thirdname = value;
                }
            }

            public int Age
            {
                get { return _Age; }
                set
                {
                    if (value > 0)
                    {
                        _Age = value;
                    }
                    else
                    {
                        WriteLine(new String('-', 20));
                        WriteLine("Age must be positive");
                        WriteLine(new String('-', 20));
                        Environment.Exit(1);
                    }
                }
            }
            public int Premia
            {
                get { return _Premia; }
                set
                {
                    if (value > 0)
                    {
                        _Premia = value;
                    }
                    else
                    {
                        WriteLine(new String('-', 20));
                        WriteLine("Premia must be positive");
                        WriteLine(new String('-', 20));
                        Environment.Exit(1);
                    }
                }
            }

            public int Salary
            {
                get { return _Salary; }
                set
                {
                    if (value > 0)
                    {
                        _Salary = value;
                    }
                    else
                    {
                        WriteLine(new String('-', 23));
                        WriteLine("Salary must be positive");
                        WriteLine(new String('-', 23));
                        Environment.Exit(1);
                    }
                }
            }
            public string Dr
            {
                get { return _Dr; }
                set
                {
                   _Dr = value;
                }
            }
            public string Dataraboty
            {
                get { return _Dataraboty; }
                set
                {
                    _Dataraboty = value;
                }
            }

            public string Department
            {
                get { return _Department; }
                set { _Department = value; }
            }
        }

         class Auto
        {
            private int _Height;
            private int _Cost;
            private int _Length;
            private int _Hp;
            private string _Birth;
            private string _Date;
            private string _Privod;
            private string _Color;
            private string _Name;
            private string _Model;
            private string _Tipkpp;


            public int Height
            {
                get { return _Height; }
                set
                {
                    _Height = value;
                }
            }
            public int Cost
            {
                get { return _Cost; }
                set
                {
                    _Cost = value;
                }
            }
            public int Length
            {
                get { return _Length; }
                set
                {
                    _Length = value;
                }
            }
            public int Hp
            {
                get { return _Hp; }
                set
                {
                    _Hp = value;
                }
            }
            public string Birth
            {
                get { return _Birth; }
                set
                {
                    _Birth = value;
                }
            }
            public string Date
            {
                get { return _Date; }
                set
                {
                    _Date = value;
                }
            }
            public string Privod
            {
                get { return _Privod; }
                set
                {
                    _Privod = value;
                }
            }
            public string Color
            {
                get { return _Color; }
                set
                {
                    _Color = value;
                }
            }
            public string Name
            {
                get { return _Name; }
                set
                {
                    _Name = value;
                }
            }
            public string Model
            {
                get { return _Model; }
                set
                {
                    _Model = value;
                }
            }
            public string Tipkpp
            {
                get { return _Tipkpp; }
                set
                {
                    _Tipkpp = value;
                }
            }
        }

        class Saloon
        {
            private int _Profit;
            private string _Name;
            private string _Class;
            private int _Birth;

            public int Profit
            {
                get { return _Profit; }
                set
                {
                    _Profit = value;
                }
            }
            public string Name
            {
                get { return _Name; }
                set
                {
                    _Name = value;
                }
            }
            public string Class
            {
                get { return _Class; }
                set
                {
                    _Class = value;
                }
            }
            public int Birth
            {
                get { return _Birth; }
                set
                {
                    _Birth = value;
                }
            }
        }

        static void AddAuto()
        {
            /*  private int _Height;
            private int _Cost;
            private int _Length;
            private int _Hp;
            private string _Birth;
            private string _Date;
            private string _Privod;
            private string _Color;
            private string _Name;
            private string _Model;
            private string _Tipkpp;*/
            WriteLine("Write cost of car");
            CAuto[ALC].Cost = Convert.ToInt32(ReadLine());

            WriteLine("Write height of car");
            CAuto[ALC].Height = Convert.ToInt32(ReadLine());

            WriteLine("Write length of car");
            CAuto[ALC].Length= Convert.ToInt32(ReadLine());

            WriteLine("Write profit of company");
            CAuto[ALC].Hp = Convert.ToInt32(ReadLine());

            WriteLine("Write profit of company");
            CAuto[ALC].Birth = ReadLine();

            WriteLine("Write profit of company");
            CAuto[ALC].Date = ReadLine();

            WriteLine("Write profit of company");
            CAuto[ALC].Privod = ReadLine();

            WriteLine("Write profit of company");
            CAuto[ALC].Color = ReadLine();

            WriteLine("Write profit of company");
            CAuto[ALC].Name = ReadLine();

            WriteLine("Write profit of company");
            CAuto[ALC].Model = ReadLine();

            WriteLine("Write profit of company");
            CAuto[ALC].Tipkpp = ReadLine();
        }

        static void AddSaloon()
        {
            CSaloon.Add(new Saloon());

            WriteLine("Write profit of company");
            CSaloon[CLC].Profit = Convert.ToInt32(ReadLine());

            WriteLine("Write name of company");
            CSaloon[CLC].Name = ReadLine();

            WriteLine("Write birth of company");
            CSaloon[CLC].Birth = Convert.ToInt32(ReadLine());

            WriteLine("Write class of company");
            CSaloon[CLC].Class = ReadLine();
            CLC++;
        }

        static void AddEmployee()
        {
        CEmployee.Add(new Employee());

            WriteLine("Write first name");
            CEmployee[ELC].Name = ReadLine();

            WriteLine("Write second name");
            CEmployee[ELC].Surname = ReadLine();

            WriteLine("Write third name");
            CEmployee[ELC].Thirdname = ReadLine();

            WriteLine("Write age of employee");
            CEmployee[ELC].Age = Convert.ToInt32(ReadLine());

            WriteLine("Write salary of employee");
            CEmployee[ELC].Salary = Convert.ToInt32(ReadLine());

            WriteLine("Write premia of employee");
            CEmployee[ELC].Premia = Convert.ToInt32(ReadLine());

            WriteLine("Write birthday");
            CEmployee[ELC].Dr = ReadLine();

            WriteLine("Write date of work");
            CEmployee[ELC].Dataraboty = ReadLine();

            WriteLine("Write department of employee");
            CEmployee[ELC].Department = ReadLine();

            ELC++;
        }
        static bool AlreadyExist(string Name,string Surname,string Thirdname)
        {
            int local_i = 0;
            foreach (Employee Hmn in CEmployee)
            {
                if (Hmn.Name == Name && Hmn.Surname == Surname && Hmn.Thirdname == Thirdname)
                {
                    return true;
                }
                else
                {
                    local_i++;
                }
            }
            return false;
        }

        static void InfoByName()
        {
            WriteLine("Write first, second and third name of person:");
            string[] tmp = ReadLine().Split().ToArray();
            string person1 = tmp[0];
            string person2 = tmp[1];
            string person3 = tmp[2];
            if (AlreadyExist(person1,person2,person3) == false)
            {
                WriteLine("Person are not exist");
            }

            foreach (Employee Hmn in CEmployee)
            {
                if (person1 == Hmn.Name && person2 == Hmn.Surname && person3 == Hmn.Thirdname)
                {
                    WriteLine(new String('-', 20));
                    WriteLine("Name: {0}\nSurname:{1}\nThirdname{2}\nAge: {3}\nSalary: {4}\nDepartment: {5}\nBirthday{6}\nDate work{7}\nPremia:{8}\n", Hmn.Name,Hmn.Surname,Hmn.Thirdname, Hmn.Age, Hmn.Salary, Hmn.Department, Hmn.Dr, Hmn.Dataraboty, Hmn.Premia);
                    WriteLine(new String('-', 20));
                    break;
                }
            }
        }

        static void InfoByType()
        {
            Console.WriteLine("Write typy of KPP");
                string kpp = Console.ReadLine();

                foreach (Auto hauto in CAuto)
                {
                if (kpp == "mechanical")
                {
                    WriteLine(new String('-', 20));
                    WriteLine("Cost:{0}\nLength{1}\nHP:{2}\nBirthdate:{3}\nDate repair:{4}\nType privod:{5}\nColor:{6}\nName:{7}\nModel{8}\n", hauto.Cost, hauto.Length,hauto.Hp,hauto.Birth,hauto.Date,hauto.Privod,hauto.Color,hauto.Name,hauto.Model);
                    WriteLine(new String('-', 20));
                }
                else if (kpp == "auto")
                {
                    WriteLine(new String('-', 20));
                    WriteLine("Cost:{0}\nLength{1}\nHP:{2}\nBirthdate:{3}\nDate repair:{4}\nType privod:{5}\nColor:{6}\nName:{7}\nModel{8}\n", hauto.Cost, hauto.Length, hauto.Hp, hauto.Birth, hauto.Date, hauto.Privod, hauto.Color, hauto.Name, hauto.Model);
                    WriteLine(new String('-', 20));
                }
                else if (kpp == "variator")
                {
                    WriteLine(new String('-', 20));
                    WriteLine("Cost:{0}\nLength{1}\nHP:{2}\nBirthdate:{3}\nDate repair:{4}\nType privod:{5}\nColor:{6}\nName:{7}\nModel{8}\n", hauto.Cost, hauto.Length, hauto.Hp, hauto.Birth, hauto.Date, hauto.Privod, hauto.Color, hauto.Name, hauto.Model);
                    WriteLine(new String('-', 20));
                }
                else
                {
                    Console.WriteLine("Wrong type of KPP");
                }
                }


        }

       static void Old()
        {
            int data = 0;
            string name = null;
            foreach (Saloon sln in CSaloon)
            {
            /* private int _Profit;
            private string _Name;
            private string _Class;
            private string _Birth;*/

            if (data < sln.Birth)
                {
                    data = sln.Birth;
                    name = sln.Name;
                    break;
                }
            }
            Console.WriteLine(name);
        }




        static void Main(string[] args)
        {
        label1:
            WriteLine(new String('-', 21) + "\nPrint type of command\n1:Add Auto" +
                      "\n2:Add Employee " +
                      "\n3:Get Info via Name\n4:Get Info via Type KPP\n5:Get elder saloon\n6:Add Saloon\n" + new String('-', 21));
            int typeOfCommand = Convert.ToInt32(ReadLine());
            switch (typeOfCommand)
            {
                case 1:
                    AddAuto();
                    goto label1;
                    break;
                case 2:
                    AddEmployee();
                    goto label1;
                    break;
                case 3:
                    InfoByName();
                    goto label1;
                    break;
                case 4:
                    InfoByType();
                    goto label1;
                    break;
                case 5:
                    Old();
                    goto label1;
                    break;
                case 6:
                    AddSaloon();
                    goto label1;
                    break;
            }
        }
    }
}