Generic Collection and CollectionBase

 
using System;
using System.Collections;
using System.Collections.ObjectModel;

using System.Collections.Generic;
using System.Linq;
using System.Reflection;

public class Animal
{
    public string Name;
    public int Popularity;

    public Animal(string name, int popularity)
    {
        Name = name; Popularity = popularity;
    }
}

public class AnimalCollection : Collection<Animal>
{
}

class Program
{
    static void Main()
    {
        AnimalCollection animalAnimalCollection = new AnimalCollection();
        animalAnimalCollection.Add(new Animal("Kangaroo", 10));
        animalAnimalCollection.Add(new Animal("Lion", 20));
        foreach (Animal a in animalAnimalCollection) 
           Console.WriteLine(a.Name);
    }
}