Fixed-price .NET migration audit · UK

Still on .NET Framework? Get a board-ready migration plan in 5 days.

We audit your legacy .NET codebase and deliver a written report a budget holder can act on: what it will take to reach modern .NET, where the risks are, and what order to do it in. £499 fixed, whatever we find. Delivered within 5 working days of repo access.

What you get

One document. Every answer a migration decision needs.

The report is the product. It stands alone — plenty of clients take it and run the migration with their own team.

01

Current-state assessment

Every project, framework version, and language variant in the estate, mapped. Including the apps nobody remembers deploying.

02

Risk register

The blockers that derail migrations: dependencies with no modern equivalent, business logic buried in UI event handlers, undocumented integrations.

03

Dependency analysis

Third-party packages, internal couplings, and databases, graded by migration difficulty.

04

Effort estimate

A realistic range in developer-weeks, grounded in two decades of delivering these migrations — not a tool's guess.

05

Sequencing plan

What to migrate first, what can wait, and how to do it without the business noticing.

06

Modernisation recommendations

Where containerisation, cloud services, or a WinForms-to-Blazor rebuild pays for itself — and where it doesn't.

How it works

Three steps. Nothing required from your team beyond the first two.

01

A 30-minute call

You tell us what you've got and what's making migration feel risky. If the audit isn't the right fit, we'll say so on this call.

02

Read-only repo access

Git access to the relevant solutions. Read-only, under NDA if you want one. No agents installed, nothing runs in your environment.

03

Your report, within 5 working days of repo access

A written document plus a walkthrough call. Questions answered until you're confident presenting it internally.

Principal-led, always.

Every audit is performed end-to-end by our principal consultant — 21 years of .NET delivery across rail freight, financial services, and mortgage platforms. No juniors, no offshoring, no handoffs.

Pricing

£499 fixed

One price, whatever we find. No day rates, no scope creep, no retainer.

If the report doesn't give you a clear, costed path forward, you don't pay.

Book an Audit

Track record

DB Cargo UK2026

Legacy .NET migration — VB.Net Framework 2.0–4.8 → C# .NET 8/9/10, WinForms → Blazor, Docker containerisation, Azure DevOps CI/CD.

CMS Analytics2024–25

.NET Core 3.1 & Framework 4.8 → .NET 8/10, AWS Lambda event-driven processing, S3 document storage, financial PDF and MICR generation.

Arrow / Mars Capital2023–24

Mortgage servicing platform for a major Irish bank — 5-solution legacy modernisation, Angular 6→18, .NET 6/7/8 AWS Lambdas, Azure Service Bus, Aspose document generation.

21+Years .NET
APIto UI
£499Fixed

Is this right for you?

Good fit

  • .NET Framework 4.x or older codebase needing an upgrade path
  • CTO, tech lead, or founder planning a migration
  • You need a credible estimate for a board or budget holder
  • You've inherited a legacy system and need to know what you've got

Not a fit

  • You want the migration done, not planned (different engagement — get in touch anyway)
  • Already on .NET 6+
  • You can't grant repository access

Questions

Common questions

The migration keeps getting deferred because nobody's sized it. Fix that this month.

Book an Audit — £499