.NET

Migrating from .NET Framework to modern .NET without a big-bang rewrite

The strangler-fig pattern, YARP and incremental migration: a practical playbook for legacy .NET estates.

Odiflux Engineering · 21 August 2026 · 10 min read

Rewrites are risky. Incremental migration lets you deliver value continuously while retiring legacy code slice by slice.

The playbook

We route traffic through a YARP reverse proxy and migrate endpoints one at a time.

  • Inventory dependencies with the .NET Upgrade Assistant
  • Introduce a YARP proxy in front of the legacy app
  • Move shared libraries to .NET Standard first
  • Migrate vertical slices, test, then switch routes
  • Containerise and move to Azure when ready

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