GITHUB-COPILOT PUB_DATE: 2026.03.09

A PRAGMATIC .NET 10 MIGRATION PLAYBOOK: YARP STRANGLER + COPILOT + AZURE

A new community playbook outlines a practical path to migrate legacy .NET apps to .NET 10 using YARP, GitHub Copilot, and Azure App Service. This guide walks t...

A pragmatic .NET 10 migration playbook: YARP Strangler + Copilot + Azure

A new community playbook outlines a practical path to migrate legacy .NET apps to .NET 10 using YARP, GitHub Copilot, and Azure App Service.

This guide walks through strangling a legacy .NET app behind YARP, carving off endpoints into .NET 10, and leaning on Copilot to speed scaffolding and refactors. It targets Azure App Service, with the author referencing a “Managed Instance” option, and tools like Visual Studio 2026 for the workflow article.

If your team lives in JetBrains IDEs, Copilot is available via the official plugin plugin. A recent community request to let Copilot edit secret gists signals that capability isn’t available today discussion.

[ WHY_IT_MATTERS ]
01.

It offers a low-risk path to peel off legacy .NET services while the monolith keeps running.

02.

Copilot can reduce migration toil, but expectations should match current capabilities.

[ WHAT_TO_TEST ]
  • terminal

    Stand up YARP in front of a high-read legacy endpoint and compare latency/error rates before and after routing.

  • terminal

    Time-box a controller/model port with and without Copilot to measure code throughput and review quality.

[ BROWNFIELD_PERSPECTIVE ]

Legacy codebase integration strategies...

  • 01.

    Start with read-only routes, add YARP, build parity tests, then switch traffic slice-by-slice.

  • 02.

    Validate your target Azure App Service SKU and features in your tenant before planning cutovers.

[ GREENFIELD_PERSPECTIVE ]

Fresh architecture paradigms...

  • 01.

    Adopt .NET 10 templates and minimal APIs with a gateway front, making future strangling straightforward.

  • 02.

    Enable Copilot in your standard IDE for scaffolding, while keeping code review gates tight.

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