Polymorphism is closely linked with inheritance, but it can also be used separately. Polymorphism can be defined as follows, and these definitions will be correct: The ability to use an object without knowing its actual type. The ability for objects with the same specification to have different implementations. The ability…

Hiding Mechanisms of hiding in the language: an additional layer of access protection to the class’s data and methods. Hiding, as opposed to encapsulation, refers to techniques for partially restricting access to the class’s state. The C# language features ensuring this include: Access modifiers for class members. Getters/Setters mechanism. Indexers. Explicit…

Hello everyone. In this article, I will talk about the capabilities that some classes give us, tied to the current execution context. Environment The static Environment class allows: Getting, setting, and replacing environment variable values Getting command-line arguments Terminating a process Getting the path to special folders on the machine, such…

Abstraction/Encapsulation Abstraction and encapsulation are two poles of the same phenomenon. In the OOP approach, abstraction is the delineation of certain interfaces, consistent and complete, for fully working with a class. Here we consider interfaces to mean some public members. Encapsulation, on the other hand, refers to the hiding of data…

The root of object-oriented thinking is how humans are used to thinking. In a person’s internal representation, all knowledge is expressed in the form of images of “objects”. Let’s do a quick test. Think about an apple. Imagine its color, size, texture, and what background is it on. Have you…

Evolution of Approaches in Development Programming is constantly changing. Approaches change, and new languages emerge. Why does this happen? This is a process of natural selection: After its emergence as a mass phenomenon, development served the interests of science: a small number of people had access to computing machines. Programming was quite complex, the programmer…

In this article, we will discuss the implementation of OOP concepts in the C# language itself and design patterns, which are an evolution of the application of OOP techniques to solve typical problems, but not abstractly and not on the example of test projects, but on the example of direct…

Initially, an interface is a tool for abstraction. We have 3 basic interfaces for collections: IEnumerable — the most basic interface. It only allows you to iterate through the elements of the collection sequentially (through Enumerator). ICollection — gives everything that IEnumerable provides, but also allows you to add elements…

A complete guide to choosing LINQ methods with a simple description of each method. Scalar result bool Any — Checks if there is at least one element in the collection that meets the condition All — Checks if all elements in the collection meet the condition Contains — Checks if…