Simple inheritance problem with C#

See more:

C#

I have 2 classes, Animal and dog. dog inherits from Animal class. How come i am not able to access the field b with dog.b ? If dog inherits from Animal , then should it know about b ?

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

namespace inheritance1
{
    class Program
    {
        static void Main(string[] args)
        {



            Animal a = new Animal();

            a.b = 5;

            Console.WriteLine(a.b);



            dog d = new dog();

            dog.b = 4;

            Console.WriteLine(dog.b);

            Console.ReadKey();


        }
    }


    class Animal
    {
        public int b = 3;
    
    }

    class dog : Animal
    { 
    }




}

What I have tried:

dog.b = 4;