VB.NET to C# Converter
Convert VB.NET code to C# syntax instantly in your browser. Handles classes, methods, properties, constructors, loops, conditionals, generics, LINQ, and common patterns. No upload required — nothing leaves your device.
Developer Tools Cluster
VB.NET Input
📄
Drop a .vb file here, or
C# Output
What This Tool Does
Converts VB.NET source code to equivalent C# syntax directly in your browser — no upload, no registration. Handles classes, interfaces, LINQ, async/await, properties, and common .NET patterns.
Who This Is For
- Teams modernizing legacy VB.NET applications by rewriting components in C#
- .NET developers who encounter VB.NET code in older projects and need C# equivalents
- Students learning C# who have a VB.NET background and want to compare syntax
- Consultants migrating enterprise VB.NET solutions to C# over multiple sprints
Example: Input: A VB.NET module with a Public Function, a For Each loop, and Dim declarations → Output: Equivalent C# code with correct access modifiers, foreach syntax, and var/type declarations
VB.NET vs C# Syntax Reference
| VB.NET Syntax | C# Equivalent |
|---|---|
' comment | // comment |
Imports System | using System; |
Namespace MyApp ... End Namespace | namespace MyApp { } |
Public Class Foo ... End Class | public class Foo { } |
Public Sub Method() ... End Sub | public void Method() { } |
Public Function Method() As String | public string Method() { } |
Dim name As String = "Alice" | string name = "Alice"; |
Dim x = 42 | var x = 42; |
If x > 0 Then ... Else ... End If | if (x > 0) { } else { } |
For i As Integer = 0 To 9 ... Next | for (int i = 0; i < 10; i++) |
For Each item In list ... Next | foreach (var item in list) |
While condition ... End While | while (condition) { } |
Try ... Catch e As Exception ... End Try | try { } catch (Exception e) { } |
Public Property Age As Integer | public int Age { get; set; } |
ReadOnly Property Name As String | public string Name { get; } |
AndAlso, OrElse, Not | &&, ||, ! |
=, <> | ==, != |
Nothing | null |
True, False | true, false |
Me, MyBase | this, base |
New List(Of String)() | new List<string>() |
List(Of T), Dictionary(Of K, V) | List<T>, Dictionary<K,V> |
Return value | return value; |
Throw New Exception("msg") | throw new Exception("msg"); |
Friend | internal |
NotInheritable | sealed |
MustInherit | abstract |
Overrides, Overridable | override, virtual |
VB.NET Migration Tools
Migrate your VB.NET codebase with this set of tools and guides:
- Convert C# back to VB.NET — the reverse converter
- C# vs VB.NET comparison — key syntax and feature differences
- VB.NET to C# migration guide — patterns for classes, events, and LINQ
Related Tools
- Migrated to C# and need to process CSV? Use CSV to JSON to convert data for your new code. → convert data files in your C# project
- C# code outputting JSON data? Export it to CSV for analysis. → export C# data to CSV
- Documenting your VB.NET to C# migration? Write it up in Markdown and convert to HTML. → document the migration in Markdown
- Migrated URL encoding code to C#? Verify it works correctly with the URL Encoder. → URL-encode strings in C#
Related Guides
Guide
Migrating from VB.NET to C#: A Practical Roadmap
How to plan a VB.NET to C# migration — from assessing scope to handling VB-specific features that have no direct C# equivalent.
ReferenceC# vs VB.NET: Key Syntax Differences Every Developer Should Know
A side-by-side comparison covering classes, methods, generics, LINQ, exception handling, and operators.
GuideJSON vs XML vs CSV: Which Data Format Should You Use?
A practical breakdown of when to reach for JSON, XML, or CSV in APIs and data pipelines.
Frequently Asked Questions
How accurate is the VB.NET to C# conversion?▼
The converter handles the most common VB.NET patterns — classes, methods, properties, and constructs. To go the other direction, convert C# to VB.NET. The SQL Formatter handles query dialect differences when migrating., constructors, loops, conditionals, variable declarations, type conversions, generics, and exception handling. Complex patterns like
With...End With blocks, On Error Resume Next, XML literals, and late binding (Option Strict Off) may need manual adjustment after conversion. Always review and test the output before using it in production.What is the biggest structural difference to watch for?▼
VB.NET uses
End keywords (End If, End Sub, End Class) to close blocks. C# uses curly braces {}. VB also distinguishes between Sub (void method) and Function (method with return value) — in C# both use a return type or void. The converter maps these automatically.How do VB.NET generics translate to C#?▼
VB.NET uses the
Of keyword inside parentheses for generics: List(Of String). C# uses angle bracket syntax: List<string>. The converter handles this for common collection types including List, Dictionary, IEnumerable, HashSet, and Task.What about VB.NET-specific features with no C# equivalent?▼
Some VB.NET features require manual conversion:
With...End With blocks (replace with a local variable), On Error Resume Next (replace with try/catch), XML literals (use XElement or string parsing), and string functions like Left(), Right(), Mid() (replace with Substring(), IndexOf()). The converter flags these in the output where possible.Do I need to change anything after conversion?▼
Always review converted code before using it. Common things to check: semicolons are added to statement ends, opening braces are on the correct lines per your team's style,
Boolean comparisons use == not =, and any Dim declarations without types use appropriate C# types. For large conversions, run your test suite after each class is migrated.Can I convert C# back to VB.NET?▼
Yes — use our C# to VB.NET Converter for the reverse direction.