VB.NET Consulting

Protect your business investment. Your VB.NET application represents years — sometimes decades — of business logic, domain knowledge, and user feedback. Rewriting from scratch risks losing hard-won understanding and introduces new bugs. Modernization preserves this value while incrementally improving the user experience.

Same .NET runtime, modern capabilities. VB.NET runs on .NET 9, which means it has access to the same performance improvements, security updates, and platform features as C#. Your users benefit from faster response times, better reliability, and modern authentication — all without rewriting the application.

Incremental modernization, not risky rewrites. We help you modernize VB.NET applications step by step — migrating from Web Forms to Blazor, from Windows Forms to MAUI, from ADO.NET to Entity Framework Core. Each increment delivers value to users without the risk and disruption of a big-bang rewrite.

Interoperability with modern code. VB.NET and C# compile to the same Intermediate Language (IL). You can have a project that uses both languages — new features in C#, existing logic in VB.NET. This allows your team to adopt modern patterns without abandoning the codebase they know.

Existing applications and services. VB.NET is most commonly found in production enterprise applications — Windows Forms desktop apps, ASP.NET Web Forms sites, and library projects containing business logic. These applications continue to serve their users reliably and cost-effectively.

Transitional architecture. We often design architectures where VB.NET code co-exists with C# code in the same solution. Shared interfaces and dependency injection allow new features to be built in C# while existing VB.NET code continues to function. Over time, the VB.NET surface area shrinks naturally.

Data access layer. Many VB.NET applications use ADO.NET or older ORMs for database access. We help modernize this layer to Entity Framework Core while keeping the business logic in VB.NET. This immediately improves performance, security, and maintainability.

Gradual migration to modern .NET. The end state for most VB.NET applications is a gradual migration to C# on modern .NET. But this is a multi-year journey, not a weekend project. We plan it in phases, each delivering value: first infrastructure modernization, then data access, then business logic, then UI.

The decision to stay with VB.NET, migrate to C#, or do something entirely different depends on business context, not technical purity. Here's our framework.

Don't rewrite what works. If your VB.NET application is stable, performant, and serves your users well, the highest ROI often comes from modernizing incrementally — improving the UI, migrating to modern .NET, adding new features — rather than rewriting. Your users don't care what language the code is written in.

Plan for the talent pipeline. VB.NET expertise is becoming less common among new developers. If your long-term plan involves continuing to develop the application, consider a gradual migration to C# over a multi-year horizon. This lets you tap into the larger C# developer ecosystem while maintaining business continuity.

Modernize the architecture first, the language later. The most impactful improvements come from architecture — clean separation of concerns, dependency injection, automated testing, modern deployment — not from changing the language. We often help clients modernize their VB.NET application architecture before tackling language migration.

Use the hybrid approach. VB.NET and C# can coexist in the same .NET solution. You can build new features in C# while maintaining existing VB.NET code. This hybrid approach lets you start benefiting from modern .NET patterns immediately without a costly upfront migration.