C# Online Compiler | .NET Fiddle

using System;
using System.Reflection;


public enum Animals{
	Cat,
	Dog,
	Snake
}
public class Animal
{	
}
public class Cat : Animal{	
}

public class Dog :Animal {
}

public class Snake : Animal{
}

public static class AnimalFactory{
	
	public static Animal CreateAnimal(Animals animal){
		switch(animal){
			case Animals.Cat:
				return new Cat();
			case Animals.Dog:
				return new Dog();
			case Animals.Snake:
				return new Snake();
			default:
				return null;
		}
	}
	
}


public static class Program
{
	
    static void Main()
    {
    		var snake = AnimalFactory.CreateAnimal(Animals.Snake);
			var dog = AnimalFactory.CreateAnimal(Animals.Dog);
			var cat = AnimalFactory.CreateAnimal(Animals.Cat);
		
			if(snake == null || dog == null || cat ==null ){
				Console.WriteLine("Unable to Create all objects");
				return;
			}
			Console.WriteLine("All objects created");
	}
}