Data Types and Access Specifiers in Visual Basic .NET
In this article, I will explain you about Data Types and Access Specifiers in Visual Basic .NET.
In this article, I will explain you about Data Types and Access Specifiers in Visual Basic .NET
Data Types
Visual Basic .NET Data Types, their description, type and Size in Bytes are summarized in this table below.
|
Data Type
|
Description
|
Type
|
Size in Bytes
|
|
Char
|
16-bit Unicode characters
|
System.Char
|
2
|
|
Integer
|
32-bit signed integer
|
System.Int32
|
4
|
|
Double
|
64-bit floating point variable
|
System.Double
|
8
|
|
Byte
|
8-bit unsigned integer
|
System.Byte
|
1
|
|
Long
|
64-bit signed integer
|
System.Int64
|
8
|
|
Short
|
16-bit signed integer
|
System.Int16
|
2
|
|
Single
|
32-bit floating point variable
|
System.Single
|
4
|
|
String
|
Non-Numeric Type
|
System.String
|
Varies
|
|
Date
|
|
System.Date
|
8
|
|
Boolean
|
Non-Numeric Type
|
System.Boolean
|
2
|
|
Object
|
Non-Numeric Type
|
System.Object
|
4
|
|
Decimal
|
128-bit floating point variable
|
System.Decimal
|
16
|
Access Specifiers
They describes as the accessibility scope of a variable, method or a class. By using access specifiers we can control the scope of the member object of a class. Access specifiers were used for providing security of our applications. In Visual Basic .Net there are five access specifiers and they are as follows:
Public: It have no restriction on accessibility. We can use the public members from any were inside the class or outside the class.
Private: Their accessibility scope is limited to only inside the class in which they are declared. We can't access the Private members from outside the class and it is the least permissive access level.
Protected: The protected members have scope of accessibility within the class and classes derived(Inherited) from that class.
Friend: Friend members have the accessibility scope from the same assembly and program that contain their declarations.
Protected Friend: It behave like both protected and friend access specifiers. We can access the protected friend member from anywhere in same assembly and the classes inherited from the same class.
Summary
I hope this article help you to understand about Data Types and Access Specifiers.