using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(new Cat(4));

        Console.WriteLine(new Cat(4) { PawCount = 1 });

        Console.WriteLine();

        Console.WriteLine(new Dog(4));

        Console.WriteLine(new Dog(4) { PawCount = 1 });

        Console.WriteLine();

        Console.WriteLine(new Cow(4));

        Console.WriteLine(new Cow(4) { PawCount = 1 });

    }

}

​

public record Cat(int PawCount)

{

    public int PawCount { get; init; }

}

​

public record Dog(int PawCount)

{

}

​

public record Cow(int pawCount)

{

    public int PawCount { get; init; }

}