Add migration guidance for existing F# MVC applications upgrading from .NET 10 to .NET 11 (#37686)

[SkyDevLab]

Fixes #37686

Adds migration guidance for existing F# MVC applications upgrading from .NET 10 to .NET 11:

• Explains why removing Razor Runtime Compilation requires explicit build/publish Razor compilation and assembly registration.
• Documents the required project file properties (false, true, true).
• Provides the MvcBuilderExtensions.fs implementation and Program.fs registration.

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Internal previews

File	Preview link
aspnetcore/migration/100-to-110.md	Learn preview
aspnetcore/migration/100-to-110/includes/mvc.md	Learn preview

Build report

[guardrex]

Made some suggestions.

... and we should use auto numbering, which should work fine here because of the indentation for each list item. It should render fine in the published article later.

[Copilot]

🟢 Approval recommended

The guidance addresses the migration requirements, with only non-blocking wording and snippet-organization corrections remaining.

No open issues 🎉

2 previously missed issues

In code that hasn't changed since last review

Use lowercase descriptive names for runtime compilation

aspnetcore/​migration/​100-to-110/​includes/​mvc.md:5

Use “Razor runtime compilation” and “Removing runtime compilation” here, and “obsolete runtime compilation dependency” in the closing paragraph (line 73). These are descriptive feature names, which .github/copilot-instructions.md:136-140 requires to be lowercase. Keep package and API identifiers unchanged. This is a non-blocking wording correction.

Move long F# example to an external snippet file

aspnetcore/​migration/​100-to-110/​includes/​mvc.md:34

This F# example exceeds the six-line inline-snippet limit in .github/copilot-code-instructions.md:16-25. Move it into a .fs file under the migration article's snippets/11.0/ directory and replace the fenced block with a :::code include. This is a non-blocking snippet-organization correction.

1 resolved since last review

• Add namespace or module declaration to F# file

_{Review effort: Balanced}

[guardrex]

@SkyDevLab ... Looking good.

Use lowercase descriptive names for runtime compilation

Yes, let's do that here.

Move long F# example to an external snippet file

No, let's not bother with that.

[SkyDevLab]

Updated to use lowercase 'runtime compilation' for descriptive feature references while keeping the snippet inline as requested. Thanks!

[guardrex]

Excellent! Thanks for this!!!! 🎸

[SkyDevLab]

Hi @guardrex , just wanted to share a small note about my availability. I work full-time, so I'm generally unavailable during the day and can usually check GitHub and respond after 10 PM IST.
I really appreciate your continued support and guidance on my ASP.NET Core documentation PRs. Thanks for all the reviews and for helping me contribute to the project! 😊

[guardrex]

Sure thing. Thanks for all of the PRs that you're doing. I can review and work on about six a day. The main focus right now is on .NET 11 content, but we'll get them all done and merged over the next few weeks/months.

[SkyDevLab]

Sure thing. Thanks for all of the PRs that you're doing. I can review and work on about six a day. The main focus right now is on .NET 11 content, but we'll get them all done and merged over the next few weeks/months.

Thanks for the update, Guardrex! I understand. 😊

I'd also be happy to help review .NET 11 documentation PRs if that would be useful. I'd be glad to help with technical accuracy, code samples, and documentation issues wherever I can contribute.

Let me know if there's any way I can help!

[guardrex]