Service

Modernise Legacy .NET Systems — Zero Downtime

Your .NET Framework monolith is slowing every deployment. Pages take seconds. Audit trails are unreliable. I refactor it to a zero-warning .NET 10 Blazor platform — your team maintains clean code, your users get sub-second pages, and cutover happens with zero downtime — the migration is staged behind a compatibility boundary so old and new run side by side until you switch.

Problems this solves

• Legacy .NET Framework applications that are slow, fragile, and costly to maintain

• Database transactions with no audit history — post-hoc logging that disappears on crash

• Staff working around the system with spreadsheets because the UI is too slow

• Risk of downtime during migration scares management into keeping the old system

What you get

✓ Zero-downtime migration strategy with data sync during build

✓ Same-store SQL audit trails on every database transaction

✓ EF Core LINQ optimisation and index tuning on the existing database

✓ Source code purchase available — perpetual licence included with compiled system

Who it is for

Organisations running .NET Framework 4.x or older .NET Core versions who need a modern platform without risking their live operations. Suitable for regulated industries, financial services, case management, and internal business systems with 50–500+ staff.

How it works

I run the old and new systems in parallel during the build. Data synchronises in real-time between the legacy database and the new platform. When the new system is ready, I switch the connection string in one transaction. Users log in to the new UI with the same data, same permissions, same business logic — just faster and with full audit.

.NET 10 Blazor EF Core SQL Server Same-Store Audit Zero-Downtime Cutover

Related work

See how I refactored a regulated financial services case management system that had no reliable audit history into a platform where every change is traceable to the transaction that made it — without a single day of downtime. Outcome: same-store audit on every write, and a staged migration behind a compatibility boundary so cutover was a switch rather than an outage.

View related case studies

Is your legacy .NET platform holding you back?

Book a free 30-minute call. I will look at your current stack and tell you honestly whether a zero-downtime modernisation is feasible — and what it would take.