Abstract Class Example

using System;

namespace abstractClassExample
{
    class Program
    {
        static void Main(string[] args)
        {
            Shape[] shapes = { new Sphere(4), new Cube(3) };

            foreach(Shape shape in shapes)
            {
                shape.GetInfo();
                Console.WriteLine($"{shape.Name} has a volume of {shape.Volume()}\n");
            }

            Console.ReadLine();

        }
    }

    abstract class Shape
    {
        public string Name { get; set; }

        public virtual void GetInfo()
        {
            Console.WriteLine($"This is a {Name}");
        }

        // Only declaring the method, not implementing it
        public abstract double Volume();

    }

    class Cube : Shape
    {
        public double Length { get; set; }

        public Cube(double length)
        {
            Name = "Cube";
            Length = length;
        }

        public override double Volume()
        {
            return Math.Pow(Length, 3);
        }

        public override void GetInfo()
        {
            base.GetInfo();
            Console.WriteLine($"The Cube has a length of {Length}");
        }

    class Sphere : Shape
    {
        public double Radius { get; set; }

        public Sphere(double radius)
        {
            Name = "Sphere";
            Radius = radius;
        }
        public override double Volume()
        {
            return Math.PI * (Math.Pow(Radius, 3)) * 4 / 3;
        }

        public override void GetInfo()
        {
            base.GetInfo();
            Console.WriteLine($"The Cube has a radius of {Radius}");
        }
    }
}