using System;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        int hashId = 6;

        byte[] b = Encoding.ASCII.GetBytes(string.Format("{0:d2}", hashId));

        byte[] b2 = new byte[2] { 0x30, 0x36 };

        Console.WriteLine((int)b[0]);

        Console.WriteLine((int)b[1]);

        Console.WriteLine("-------------");

        Console.WriteLine((int)b2[0]);

        Console.WriteLine((int)b2[1]);

        Console.WriteLine("-------------");

        Console.WriteLine(string.Format("{0:x}", 48 + hashId));

        Console.WriteLine(string.Format("{0:00}", hashId));

        Animal a = new Cat();

    }

}

​

internal class Animal

{

    public Animal()

    {

        Console.WriteLine("Animal");

    }

​

    public virtual string Print()

    {

        return "Animal";

    }

}

​

internal class Dog : Animal

{

    public Dog()

    {

        Console.WriteLine("Dog");

    }

​

    public override string Print()

    {

        return "Dog";

    }

}

​

internal class Cat : Animal

{

    public Cat()

    {

        Console.WriteLine("Cat");

    }

​

    public override string Print()

    {

        return "Cat";

    }

}

​

​