using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BaiTap
{
    abstract public class Xe
        {

        public Xe()
        {

        }
        public string myName
        {
            get
            {
                return contents;
            }
            set
            {
                contents = value;
            }
        }

        private string contents;
        abstract public void Who();
        //{

        //    Console.WriteLine("Tôi là xe: {0}", contents);
        //}
    }
        public class Xe_Toyota : Xe
    {
        public Xe_Toyota(string Toyotacontents) : base()
        {
            this.Toyotacontents = Toyotacontents;
        }

            public override void Who()
            {
                //base.Who();
                Console.WriteLine("Tôi là xe: {0}", Toyotacontents);
            }
            
            public string myName
            {
                get
                {
                    return Toyotacontents;
                }
                set
                {
                    Toyotacontents = value;
                }
            }
            
            private string Toyotacontents;
        }

        public class Xe_Dream : Xe
    {
        public Xe_Dream(string Dreamboxcontents) : base()
        {
            this.Dreamboxcontents = Dreamboxcontents;
        }

        public override void Who()
            {
            //base.Who();
            Console.WriteLine("Tôi là xe: {0}", Dreamboxcontents);
        }

        public string myName
        {
            get
            {
                return Dreamboxcontents;
            }
            set
            {
                Dreamboxcontents = value;
            }
        }

        private string Dreamboxcontents;
        }

    public class Xe_Spacy : Xe
    {
        public Xe_Spacy(string Spacycontents) : base()
        {
            this.Spacycontents = Spacycontents;
        }


        public override void Who()
            {
            //base.Who();
            Console.WriteLine("Tôi là xe: {0}", Spacycontents);
        }

        public string myName
        {
            get
            {
                return Spacycontents;
            }
            set
            {
                Spacycontents = value;
            }
        }

        private string Spacycontents;
        }

        public class Xe_BMW : Xe
    {
        public Xe_BMW(string BMWcontents) : base()
        {
            this.BMWcontents = BMWcontents;
        }
        public override void Who()
            {
            //base.Who();
            Console.WriteLine("Tôi là xe: {0}", BMWcontents);
        }
        public string myName
        {
            get
            {
                return BMWcontents;
            }
            set
            {
                BMWcontents = value;
            }
        }
        private string BMWcontents;
        }

    public class Xe_Fiat : Xe
    {
        public Xe_Fiat(string Fiatcontents) : base()
        {
            this.Fiatcontents = Fiatcontents;
        }
        public override void Who()
            {
            //base.Who();
            Console.WriteLine("Tôi là xe: {0}", Fiatcontents);
        }
        public string myName
        {
            get
            {
                return Fiatcontents;
            }
            set
            {
                Fiatcontents = value;
            }
        }
        private string Fiatcontents;
        }

    public class Xe_Dulich : Xe
    {
        public Xe_Dulich(string Dulichcontents) : base()
        {
            this.Dulichcontents = Dulichcontents;
        }
        public override void Who()
        {
            //base.Who();
            Console.WriteLine("Tôi là xe: {0}", Dulichcontents);
        }
        public string myName
        {
            get
            {
                return Dulichcontents;
            }
            set
            {
                Dulichcontents = value;
            }
        }
        private string Dulichcontents;
    }

    public class Xe_May : Xe
    {
        public Xe_May(string Maycontents) : base()
        {
            this.Maycontents = Maycontents;
        }
        public override void Who()
        {
            //base.Who();
            Console.WriteLine("Tôi là xe: {0}", Maycontents);
        }
        public string myname
        {
            get
            {
                return Maycontents;
            }
            set
            {
                Maycontents = value;
            }
        }
        private string Maycontents;
    }



    class Program
            {
        
            static void Main(string[] args)
            {
            
            Xe[] xeco = new Xe[7];
            xeco[0] = new Xe_Toyota("Toyota");

            xeco[1] = new Xe_Dream("Dream");

            xeco[2] = new Xe_Spacy("Spacy");

            xeco[3] = new Xe_BMW("BMW");

            xeco[4] = new Xe_Fiat("Fiat");

            xeco[5] = new Xe_Dulich("Dulich");

            xeco[6] = new Xe_May("May");

            for (int i = 0; i < 7; i++)
            {
                xeco[i].Who();
            }

            Console.ReadLine();
            }
        }
}