Hands-On Design Patterns with C# and .NET Core

Generics

A generic defines a behavior that can be applied to a class. A commonly used form of this is in collections, where the same approach to handling an object can be applied regardless of the type of object. For example, a list of strings or a list of integers can be handled using the same logic without having to differentiate between the specific types.

Going back to pets, we could define a generic class for feeding a pet. This class simply feeds a pet given both the pet and some food, as shown in the following code:

public static class PetFeeder{    public static void FeedPet<TP, TF>(TP pet, TF food) where TP : PetAnimal                                                    where TF : IPetFood     {        pet.Feed(food);     }}

There are a couple of interesting thing to point out here. First of all, ...