Cookbook – VisualBasic.NET for Beginners – Chapter 23 : Classes

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Visual Basic .NET (VB.NET) is a programming language that is used to create software for Windows operating systems. It is a modern version of the original Visual Basic programming language and is part of the .NET framework.

One of the key concepts in VB.NET is the idea of a “class.” A class is like a blueprint or template for creating objects. An object is a specific instance of a class, and it can have its own properties and methods.

Properties are like variables that hold information about an object. For example, a class for a car might have properties for the make, model, and color of the car. Methods are like actions that an object can perform. For example, a class for a car might have a method for starting the engine.

When you create a new class in VB.NET, you use the “Class” keyword to define it. Inside the class, you can add properties and methods. You can also include other code, such as constructors and destructors, which are special methods that are run when an object is created or destroyed.

Once you have created a class, you can create new objects from it. This is called “instantiating” the class. To instantiate a class, you use the “New” keyword and the name of the class. For example, if you have a class called “Car,” you would create a new object like this:

Dim myCar As New Car

This creates a new object called “myCar” that is an instance of the “Car” class. You can then use the properties and methods of the class to work with the object.

In VB.NET, classes can also be inherited. This means that a class can be based on another class, and it will inherit all of the properties and methods of the parent class. This is useful for creating new classes that are similar to existing ones, but with some extra functionality.

Inheritance is useful for creating a class hierarchy. For example, you might have a base class called “Vehicle” that has properties and methods common to all types of vehicles. You could then create classes for specific types of vehicles, such as “Car” and “Truck,” that inherit from the “Vehicle” class. These derived classes will have all the properties and methods of the base class, and can also have their own properties and methods.

In summary, classes are a fundamental concept in VB.NET that allow you to create objects with specific properties and methods. Classes can be instantiated to create new objects, and can also be inherited to create new classes based on existing ones. Understanding how to work with classes is an essential part of programming with VB.NET.


Cookbook – VisualBasic.NET for Beginners – Chapter 23 : Classes


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