VB.NET Cheat Sheet
Core VB.NET syntax covering variables, control flow, classes and inheritance, collections, and common data types.
2 PagesBeginnerApr 5, 2026
Basics
Variables and console output.
vbnet
Module Program Sub Main() Dim name As String = "World" Console.WriteLine($"Hello, {name}!") Dim x As Integer = 42 Console.WriteLine("Value: " & x) End SubEnd Module
Control Flow
Conditionals and loops.
vbnet
Dim x As Integer = 10If x > 5 Then Console.WriteLine("big")ElseIf x = 5 Then Console.WriteLine("equal")Else Console.WriteLine("small")End IfFor i As Integer = 1 To 5 Console.WriteLine($"i = {i}")NextDim count As Integer = 0While count < 3 count += 1End While
Classes & Inheritance
Defining a base class and a derived class.
vbnet
Public Class Animal Public Property Name As String Public Sub New(name As String) Me.Name = name End Sub Public Overridable Sub Speak() Console.WriteLine($"{Name} makes a sound") End SubEnd ClassPublic Class Dog Inherits Animal Public Sub New(name As String) MyBase.New(name) End Sub Public Overrides Sub Speak() Console.WriteLine($"{Name} barks") End SubEnd Class
Collections
Generic collections and LINQ.
- Dim list As New List(Of Integer)- Generic strongly-typed list
- list.Add(5)- Appends an item to a collection
- Dim dict As New Dictionary(Of String, Integer)- Key/value map
- For Each item In list ... Next- Iterates a collection
- Array.Sort(arr)- Sorts an array in place
- list.Where(Function(x) x > 5)- LINQ filter (requires Imports System.Linq)
Data Types
Common built-in types.
- Integer- 32-bit signed integer
- Double- Double-precision floating point
- String- Immutable text type
- Boolean- True/False value
- Nothing- Null reference / default value
- Dim x As Integer?- Nullable value type
Pro Tip
Enable Option Strict On at the top of your files to catch implicit narrowing conversions at compile time instead of runtime InvalidCastExceptions.
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