using System;

public class Program

{

    public struct Rectangle

    {

        private int _h;

        public int H

        {

            get => _h;

            set => _h = value > 0 ? value : 10;

        }

        public int W {get;set;}

        public int Area => H * ++W;

        public override string ToString()

            => $"Area is {Area}";

    }

    public static void Main()

    {

        var r = new Rectangle { W = 10, H = 20 };

        Console.WriteLine(r.Area);

        Console.WriteLine(r.ToString());

        Console.WriteLine(r.Area);

    }

}