OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step


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Probably, you are already familiar with classes and objects.

Simply speaking, a Class is a definition of a real life object. For example, Human is a class for representing all human beings. Dog is a class to represent all Dogs.

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Classes can contain functions too. Animals is a namespace. An object is an instance of a Class. For example, Jimmy is an object of type Dog. We will create an object in the next section. Read on. You can use modules to write common functions. A Module is a group of functions. Unlike functions in classes, Public functions in modules can be called directly from anywhere else. VB provides Function s and Subroutines.

Function s and Subroutines are almost the same, but the difference is that a subroutine can't return a value. The major access types are Public , Private , Friend and Protected. A Class may contain functions, variables etc.

If they are Public , they can be accessed by creating objects of the Class. Private and Protected members can be accessed only by the functions inside the Class. Protected members are much like Private members, but they have some special use while inheriting a Class. We will see this later, in Inheritance Lesson 5. Friend members can be accessed only by elements of the same project, and not by the ones outside the current project.

Let us expand our dog class. Putting all the data and related functions in a Class is called Encapsulation. Normally, in a Class , variables used to hold data like the age of a dog is declared as Private.


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Functions or property routines are used to access these variables. Protecting the data of an object from outside functions is called Abstraction or Data Hiding.

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This prevents accidental modification of data by functions outside the class. The shared members in a class both functions and variables can be used without creating objects of a class as shown.

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The Shared modifier indicates that the method does not operate on a specific instance of a type and may be invoked directly from a type rather than through a particular instance of a type. Walk is a Public function in this class. It is not shared. Overloading is a simple technique, to enable a single function name to accept parameters of different type.

Let us see a simple Adder class. Here, we have two Add functions. This one adds two integers. ToString is equivalent to the good old CStr.

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Inheritance is the property in which, a derived class acquires the attributes of its base class. In simple terms, you can create or 'inherit' your own class derived class , using an existing class base class. You can use the Inherits keyword for this. Let us see a simple example.


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The MustInherit keyword specifies that a class cannot be instantiated and can be used only as a base class. The NotInheritable keyword specifies that a class cannot be inherited.

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By default, a derived class Inherits methods from its base class. If an inherited property or method needs to behave differently in the derived class it can be overridden; that is, you can define a new implementation of the method in the derived class. The Overridable keyword is used to mark a function as overridable. NET is an object-oriented language, which supports the abstraction, encapsulation, inheritance, and polymorphism features.

It is the most productive tool for rapidly creating a wide range of Windows, Web, Mobile, and Office applications built on the. The Visual Basic language is designed to be human readable and accessible to everyone from novice programmers to advanced system architects. All of this is built on top of the. NET Framework, which guarantees that programs written in Visual Basic run with unsurpassed scalability and reliability.

Also programs written in VB. Net will interoperate seamlessly with programs written in any other. Many programmers says VB. Nets ease of use as the key to its success. Using VB. I hope this site will help you to acquire the skills and knowledge necessary to develop various types of applications in VB. NET in a simplified manner rather than in a complex way.

Home C VB. Net Framework Tutorials. What is Microsoft. Net Framework what are the functions of microsoft. Common Language Runtime in. Net Framework What is. Net Framework Metadata what is. Net Satellite Assembly? What are the contents of an Assembly? Net Strong Name What is. Net Threads. NET data types VB.

OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step
OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step
OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step
OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step
OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step
OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step
OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step
OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step OOP with Microsoft Visual Basic.NET and Microsoft Visual C# .NET step by step

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