Can't find .NET as a version in Azure App Service

Question

I migrated my app locally from 3.1 to version 5. I deployed it but I get the following error:

HTTP Error 500.31 - ANCM Failed to Find Native Dependencies Common solutions to this issue: The specified version of Microsoft.NetCore.App or Microsoft.AspNetCore.App was not found. Specific error detected by ANCM: Error: An assembly specified in the application dependencies manifest (Microsoft.AspNetCore.AzureAppServices.HostingStartup.deps.json) was not found: package: 'Microsoft.AspNetCore.AzureAppServices.HostingStartup', version: '5.0.0-preview.3.20215.14' path: 'lib/netcoreapp5.0/Microsoft.AspNetCore.AzureAppServices.HostingStartup.dll' Troubleshooting steps: Check the system event log for error messages Enable logging the application process' stdout messages Attach a debugger to the application process and inspect

I did some research and found that I need to update my App Service as well but I can't find .NET 5 as a listing in my App Service. This is what the dropdown looks like:

I added ASP.NET Core 5.0 (x64) Runtime (because the platform is 32 bits) as an Extension as well but I kept getting the same error. Is there a way to fix this?

Answer 1

As suggested by @Panagiotis Kanavos, there's no .NET 5 any more and it was a short-term version that that has been deprecated last week.

That wasn't a sudden change either, the .NET (Core) lifecycle policies were announced several years ago by MSFT.

Aslo,there are Long-Term-Support versions that are supported for 2 years i.e. (2.1, 3.1, 6) and short-term versions like .net 5,.net core 3.0 that are released in the meantime and are only supported for 1 year.