How accurate is Code Converter for VB.NET to C# migration?

It uses Roslyn's deep analysis for high accuracy with full project context, but complex or edge-case code may require manual review. The tool is actively improved for this direction based on user feedback.

Can I use Code Converter without installing Visual Studio?

Yes, the online snippet converter works in browsers, but for full project conversions or command-line use, you need Visual Studio 2026 18.0+ or .NET SDK 10.0 installed locally.

How does Code Converter compare to Telerik Code Converter?

Code Converter is free, open-source, and uses local processing with Roslyn for accuracy, while Telerik's is commercial and may offer different features or support levels. Code Converter is better for cost-conscious teams.

How to convert an entire Visual Studio solution with Code Converter?

Install the Visual Studio extension, right-click on the solution in Solution Explorer, and select the convert option. It leverages project context for accurate batch conversion, as shown in the README screenshots.

Is there an API for integrating Code Converter into custom tools?

Yes, via the NuGet library which underpins all converters. You can use methods like CodeConversion.ConvertDocumentUnhandledAsync for programmatic access, as mentioned in the README integration examples.

Does Code Converter support the latest .NET versions like .NET 8?

It supports projects up to .NET 5 for VB.NET as per Microsoft's blog, and uses .NET Core SDK 10.0 for building. Check the wiki for specific compatibility, as newer .NET versions might have limited support.

Open-Awesome

Code Converter

MITC#v10.0.1

Convert code between C# and VB.NET using Roslyn, available as a Visual Studio extension, online tool, CLI, and library.

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902 stars238 forks0 contributors

What is Code Converter?

Code Converter is a free, open-source tool that translates code between C# and Visual Basic .NET (VB.NET) using Microsoft's Roslyn compiler platform. It solves the problem of migrating legacy VB.NET projects to C# or incorporating C# snippets into VB.NET codebases by providing accurate, context-aware conversions. The tool is available in multiple formats, including a Visual Studio extension, online converter, command-line interface, and NuGet library.

Target Audience

.NET developers maintaining or migrating projects between C# and VB.NET, particularly those dealing with legacy VB.NET codebases or seeking to learn one language from the other.

Value Proposition

Developers choose Code Converter for its high accuracy through full project context analysis with Roslyn, the safety of local processing, and flexibility across multiple integration options—all completely free and open source.

Overview

Convert code from C# to VB.NET and vice versa using Roslyn

Use Cases

Best For

Migrating entire VB.NET projects to C# as VB.NET support declines
Converting C# code snippets from Stack Overflow for use in VB.NET projects
Learning C# syntax when coming from a VB.NET background (or vice versa)
Integrating code conversion into custom tools via the NuGet library
Converting small selections or individual files between C# and VB.NET quickly
Ensuring code conversions are accurate by leveraging full project context

Not Ideal For

Projects requiring high-accuracy C# to VB.NET conversions, as the tool admits lower quality in that direction.
Environments without Visual Studio 2026 18.0+ or .NET Core SDK 10.0, since some formats depend on these specific versions.
Teams needing a cloud-based or server-side conversion API, as all processing is local and requires installation.
Developers working with languages outside C# and VB.NET, as the tool is specialized only for these two .NET languages.

Pros & Cons

Pros

Roslyn-Powered Accuracy

Uses Microsoft's Roslyn compiler for full project context analysis, ensuring conversions are semantically accurate and reliable, especially for VB.NET to C# migrations.

Multiple Deployment Formats

Available as a Visual Studio extension, online snippet converter, command-line tool, and NuGet library, offering flexibility for different development workflows.

Local Code Processing

All conversion runs entirely on the user's machine, keeping code secure and private without sending it to external servers, as emphasized in the README.

Active VB to C# Focus

Continuously improved with a focus on VB.NET to C# conversion quality, addressing the decline in VB.NET support and based on user feedback.

Cons

Asymmetric Conversion Quality

The README explicitly states that VB to C# conversion is much higher quality than C# to VB, making it less reliable for reverse conversions or snippet incorporation.

Tooling Dependencies

The command-line version requires Visual Studio 2026 18.0+ to be installed, which can be a barrier for environments without VS or with older versions.

Limited to .NET Ecosystem

Only converts between C# and VB.NET, lacking support for other programming languages or cross-platform code translation, which restricts its use cases.

Frequently Asked Questions

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