Introduction to Inheritance

using System;
class A
{
    public A()
    {
        Console.WriteLine("This is class A");
    }
}

using System;
class B : A
{
    public B()
    {
        Console.WriteLine("This is class B");
    }
}

using System;
class Program
{
    public static void Main(String[] args)
    {
        B bb = new B();
    }
}