Example Classes

The classes used in these samples are:

using System;

namespace Simpsons
{
    public abstract class Pet
    {
        public abstract string Name { get; set; }

        public override string ToString()
        {
            return Name;
        }
    }

    public class Cat : Pet
    {
        public override string Name { get; set; }
    }

    public class Dog : Pet
    {
        public override string Name { get; set; }
    }

    public class Person
    {
        public Person()
        {
        }

        public Person(string name)
        {
            Name = name ?? throw new ArgumentNullException(nameof(name));
        }

        public string Name { get; set; }
        public int Salary { get; set; }


        public override string ToString()
        {
            return Name;
        }
    }
}