VB.NET Keywords


A keyword is a reserved word with special meanings in the compiler, whose meaning cannot be changed. Therefore, these keywords cannot be used as an identifier in VB.NET programming such as class name, variable, function, module, etc.

In visual basic, there are two types of Keywords.

Reserved Keywords

Reserved keywords cannot be used as names for programming elements such as variables, procedures, etc. You can bypass this restriction by enclosing the name in brackets ([]).

Here is the list of the most commonly used reserved keywords.

AddHandler AddressOf Alias And AndAlso As
Boolean ByRef Byte ByVal Call Case
Catch CBool CByte CChar CDate CDbl
CDec Char CInt Class CLng CObj
Const Continue CSByte CShort CSng CStr
CType CUInt CULng CUShort Date Decimal
Declare Default Delegate Dim DirectCast Do
Double Each Else ElseIf End EndIf
Enum Erase Error Event Exit False
Finally For For Each…Next Friend Function Get
GetType GetXMLNamespace Global GoSub GoTo Handles
If Implements Imports In Inherits Integer
Interface Is IsNot Let Lib Like
Long Loop Me Mod Module MustInherit
MustOverride MyBase MyClass Namespace Narrowing New
Next Not Nothing NotInheritable NotOverridable Object
Of On Operator Option Optional Or
OrElse Out Overloads Overridable Overrides ParamArray
Partial Private Property Protected Public RaiseEvent
ReadOnly ReDim REM RemoveHandler Resume Return
SByte Select Set Shadows Shared Short
Single Static Step Stop String Structure
Sub SyncLock Then Throw To True
Try TryCast TypeOf…Is UInteger ULong UShort
Using Variant Wend When While Widening
With WithEvents WriteOnly Xor #Const #Else
#ElseIf #End #If

Unreserved Keywords

Unreserved keywords can be used as names for your programming elements. However, it is not recommended because it can make your code hard to read and can lead to subtle errors that can be difficult to find.

Aggregate Ansi Assembly Async Auto Await
Binary Compare Custom Distinct Equals Explicit
From Group By Group Join Into IsFalse IsTrue
Iterator Join Key Mid Off Order By
Preserve Skip Skip While Strict Take Take While
Text Unicode Until Where Yield #ExternalSource
#Region

Use Keywords as Variable Names

If you want to use Keywords as variable names (identifiers), then we need to enclose the variable name in brackets ([]). For example, [Class] is a valid identifier, but Class is not because it’s a keyword and having a special meaning for the compiler.

The following example shows how to use the reserve keywords as a variable name by enclosing the variable name with brackets ([]).

Imports System

Module Program
    Public Class [Class]
        Public name As String
    End Class

    Sub Main()
        Dim p1 As [Class] = New [Class]()
        p1.name = "John"
        Console.WriteLine("Age: " & p1.name)
    End Sub
End Module

As you can see a Class keyword is used as a variable name [Class] by enclosing it with brackets ([]).