.NET Migration Services: .NET Framework, .NET 8 and .NET 9 to .NET 10
Microsoft ends support for .NET 8 and .NET 9 on 10 November 2026. The applications keep running after that date; the security fixes stop. Rorix runs a .NET migration the way it has run two already on live systems: an AgTech platform for a Pacific Northwest company from .NET Core 2.1 to .NET 8, alongside its Angular 7 to 17 upgrade, and Lorecs from .NET Core 2.1 to .NET 9, now being moved to .NET 10. Audit first, then supported version hops in reversible stages, with the old and new builds side by side until the cutover is proven.
How does Rorix migrate an application to .NET 10?
With a codebase and dependency audit first, then supported version hops in reversible stages behind test coverage, with the old and new builds running side by side until the cutover is proven. Rorix engineers have taken an AgTech platform from .NET Core 2.1 to .NET 8 and Lorecs from .NET Core 2.1 to .NET 9 this way, on systems that stayed live throughout.
Deliverables
Every engagement is scoped to deliver specific, measurable outcomes.
Migration Assessment
An inventory of every project, NuGet package, API and runtime feature your application depends on, with the breaking changes between your version and .NET 10 listed against the code that hits them.
Version Hop Plan
The sequence of supported versions the application moves through, which packages change at each hop, and what is tested before the next one starts, so the plan is a schedule rather than a hope.
.NET Framework to Modern .NET
For 4.x applications: the parts that port as they are, the parts that have to be replaced (Web Forms, WCF server hosting, Workflow Foundation, Entity Framework 6) and the order to take them in.
Staged Cutover
Old and new builds run side by side behind test coverage until the new one is proven, so the business keeps operating while the runtime underneath it changes.
Dependency and Security Fixes
Packages brought to supported versions, deprecated APIs replaced, and the warnings the upgrade surfaces fixed rather than suppressed.
Handover and Documentation
A written record of what changed, the test suite that proves it, and a walkthrough for your team. 100% of the code and IP is yours.
Technologies We Use
Production-proven tools selected for longevity, performance, and ecosystem health.
Why Teams Choose Rorix Technologies
Two .NET Migrations Delivered, Both on Live Systems
An AgTech platform for a Pacific Northwest company went from .NET Core 2.1 to .NET 8 while its frontend moved from Angular 7 to 17. Lorecs went from .NET Core 2.1 to .NET 9 with zero invoice rejections after launch, and is now being moved to .NET 10. Neither system was taken down to do it.
Version Hops, Not a Big Bang
A multi-version jump runs as a sequence of supported upgrades, each one tested before the next, so a problem is found at the version that introduced it rather than at the end.
Application Engineering Only
We migrate the code, the packages and the tests. Hosting, pipelines and infrastructure stay with your team, in your accounts.
Common Questions
More on engineering teams
Everything on this topic that lives elsewhere on the site.
Lorecs: .NET Core 2.1 to .NET 9 on a live supply chain platformProject management at Rorix is top-notch. They deliver on time, stay responsive, and adapt to our needs. They don’t just stop when daily tasks are done, they keep refining lower-priority items and actively suggest improvements to better the system.
Ready to Start Your .NET Migration Project?
Tell us about your project and we will get back to you within one business day with a clear plan and an honest estimate.