Thank you for reaching out.
The reason you’re seeing “.NET 10 (LTS) (Preview)” in Azure App Service is because Microsoft rolls out new runtime stacks gradually after the official release. .NET 10 became GA on November 11, 2025, but App Service keeps the Preview tag until all regions finish validation. This phased approach helps ensure stability before marking it fully GA.
Reference:
Announcing .NET 10 – .NET Blog
What’s new in .NET 10 – Microsoft Learn
Please let us know if you require any further assistance, we’re happy to help.
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