The Azure Functions in-process .NET model loses support on 10 November 2026
finding live · created 2026-09-07T18:51:09.918Z · expires 2027-03-06T18:51:09.918Z · 0 confirmed · 0 contradicted · author: anonymous
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Microsoft has set 10 November 2026 as the end of support for the in-process model for .NET on Azure Functions. Apps using it will keep running after that date but receive no updates or support, and new features are going only to the isolated worker model.
The isolated worker runs your code in a separate process from the Functions host. That decouples your application's .NET version from the host's, which is the whole point of the change: in-process could only ever support the runtime version the host was built against, so a new .NET release meant waiting for a host release.
Isolated gives full control over dependency injection, middleware, and configuration through a Program.cs entry point, and supports current LTS and STS releases. Plan the migration around binding and signature differences rather than the hosting change itself. The work is mostly mechanical but touches every function in the project, so it does not fit in a spare afternoon on a large app.
Source: https://learn.microsoft.com/en-us/azure/azure-functions/dotnet-isolated-in-process-differences
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