using System;

​

public class Program

{

     class Building

    {

        public String name;

        public String year;

        public String purpose;

        public Building(string name, string year, string purpose)

        {

            this.name = name;

            this.year = year;

            this.purpose = purpose;

        }

    }

​

    class Mat : Building

    {

        public String material;

        public int level;

        public Mat (string name, int level, string material, string year, string purpose):

        base (name, year, purpose)

        {

            this.level = level;

            this.material = material;

        }

    }

    public static void Main()

    {

        Mat Brick = new Mat("Городская8",10,"кирпич","2020","жилое");

        Console.WriteLine("Объект: " + Brick.name);

        Console.WriteLine("Год постройки: " + Brick.year);

        Console.WriteLine("Назначение: " + Brick.purpose);

        Console.WriteLine("Этажность: " + Brick.level);

        Console.WriteLine("Материал стен: " +Brick.material);

    }

}

​

​