Legacy .NET
Modernisation
For mid-sized businesses running a .NET Framework 1.1–4.8 application they cannot replace and can no longer safely change. We take it to .NET 8 or 10 module by module, with the system running throughout.
Why Legacy .NET Systems
Can't Stay as They Are
Every year on an unsupported framework is a year of compounding risk, security vulnerabilities, rising maintenance cost, and a shrinking pool of developers who understand the code.
Security Vulnerabilities Accumulating
Older .NET Framework versions no longer receive security patches. Every month of delay is another month of unpatched CVEs in production.
Can't Integrate with Modern Tools
Legacy .NET apps struggle to connect to modern APIs, cloud services, mobile apps, and BI platforms, leaving the business operating in silos.
Developers Can't Be Found
The pool of developers who understand VB.NET, WebForms, WCF, and COM interop shrinks every year. Support becomes expensive and fragile.
Technical Debt Compounding
Every hotfix and workaround added over the years makes the next change harder and more dangerous. The cost of the next bug fix keeps rising.
Phased Migration,
Not a Rewrite
We never do a big-bang rewrite. We migrate your system incrementally, module by module, layer by layer, so your business keeps running throughout the entire process. Each phase is tested, documented, and signed off before the next begins.
The business logic in your legacy system is the product of 20 years of real-world decisions. Our job is to carry it forward, not recreate it from scratch.
The Full Migration Spectrum,
Framework to .NET 10
From VB.NET 2003 to C# on .NET 10, including the front end and the API layer a migration of this kind always turns out to need.
Codebase Assessment & Risk Mapping
Full audit of your existing architecture, dependencies, third-party integrations, and breaking-change risk before any migration begins.
.NET Framework → .NET 8 / 10 Migration
Incremental migration of your application from .NET Framework 1.1–4.8 to modern .NET, preserving business logic, step by step.
WebForms → Blazor, Razor Pages or React
Ageing WebForms and WinForms interfaces rebuilt as Blazor Server or WASM, Razor Pages, or a React or Angular SPA against your .NET API. Mobile-first, built to WCAG 2.1 AA, with the underlying business logic carried across rather than reinvented.
WCF & ASMX → REST / gRPC APIs
Replace legacy SOAP and WCF services with modern .NET Web API or gRPC endpoints, designed contract-first against an OpenAPI spec and keeping existing consumers working throughout the transition.
API Layer Over a Legacy Core
Wrap an existing .NET Framework or COM-based system in a documented REST or gRPC interface without altering the core, so mobile apps, partners and reporting tools can reach the business logic safely. Includes third-party integrations — payment, logistics, CRM and government data services — with real retry and error handling.
Authentication & API Security
OAuth2, OpenID Connect, JWT and role-based access replacing forms authentication and bespoke session handling, designed into the migrated system rather than bolted on after it ships.
Database Modernisation
Upgrade from SQL Server 2005/2008 schemas and raw ADO.NET to modern EF Core patterns, with performance tuning included.
DevOps & CI/CD Setup
Introduce modern deployment pipelines, Azure DevOps or GitHub Actions, containerisation, and environment management for the modernised system.
Our Phased Modernisation
Engagement Model
No big-bang rewrites. Every migration is structured in controlled phases, with your system running throughout.
Codebase Audit & Dependency Mapping
We document every layer: framework version, NuGet packages, COM dependencies, third-party APIs, and deployment process.
Migration Roadmap & Phase Planning
We design a phased upgrade plan, breaking the migration into safe, testable increments with clear milestones and rollback points.
Incremental Migration & Testing
We migrate module by module. Each phase is fully tested against your existing business rules before the next begins.
Handover, Documentation & Support
Full technical documentation, team knowledge transfer, and ongoing support once your modernised system is live on .NET 8 or 10.
From Legacy to Modern .NET
The full .NET stack, from the versions we migrate away from, to the modern platform we migrate towards.
Is Your .NET System Ready to Modernise?
Whether you're on .NET 2.0 or 4.8, we'll assess your system, map the risks, and give you a clear phased roadmap, with no obligation.
Ready to Move Your System to .NET 8 or 10?
Start with a fixed-scope Modernisation Assessment. In 2 weeks we map your dependencies, identify the real risks, and give you a sized, phased plan your team can act on, or an honest recommendation to leave it alone.