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This will create a feature request which anybody can view and comment on.

Please describe your requested enhancement. Good feature requests will solve common problems or enable new use cases.

What you would like to accomplish:

Support ASP.NET 6 in Google App Engine (GAE) Flex

How this might work:

Be able to deploy a GAE Flex app (gcloud app deploy) with the app.yaml with an ASP.NET 6 app:

env: flex
runtime: aspnetcore

If applicable, reasons why alternative solutions are not sufficient:

LTS for ASP.NET 3.1 will finish soon, so it would be good if customers can migrate their GAE Flex apps to use the latest version (ASP.NET 6) in a more direct way.

Business impact:

LTS for ASP.NET 3.1 will finish soon, so the apps would be running on a EOL ASP.NET version.

Other information (workarounds you have tried, documentation consulted, etc):

The workaround is to use a custom runtime for GAE Flex:

env: flex
runtime: custom

And then have a Dockerfile for the .NET 6 app that will be run as a container on GAE Flex. This example app on GitHub can be used as a reference to build the Dockerfile and the steps described in the Build Custom Runtimes documentation can be followed.