MVC F# project build with warning "FS0044: This construct is deprecated", should update the project template.

[jinzhao1127]

REGRESSION INFO: Works well on 11.0 RC 1

INSTALL STEPS:

1. Clean Win11 x64 25h2 ENU
2. Install the .NET 11.0 RC 2 SDK: https://aka.ms/dotnet/11.0.1xx/daily/dotnet-sdk-win-x64.exe
3. Add feed

Platform

• Windows
• macOS
• Linux

Repro Steps

1. Open a normal Command Prompt
2. Create a MVC F# proejct and build it

   dotnet new mvc -lang F# -o MVCFS
   cd MVCFS
   dotnet build
   

Actual Result
There is a warning FS0044: This construct is deprecated

Log:

 C:\Users\v-zhajin\MVCFS\Program.fs(29,14): warning FS0044: This construct is deprecated. 
Razor runtime compilation is obsolete and is not recommended for production scenarios. 
For production scenarios, use the default build time compilation. For development scenarios, use Hot Reload instead. 
For more information, visit https://aka.ms/aspnet/deprecate/003.

Note

1. This issue related with Mark AddRazorRuntimeCompilation methods obsolete #68841 change
2. The MVC FS template should update.
3. This issue does not repro on MVC C# project

[jinzhao1127]

@Youssef1313 , could you take a look?

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• [NETSDKE2E][Regression] With NET11 RC2 installed, "warning FS0044: This construct is deprecated..." show when build F# mvc project. sdk#56130

[github-actions]

Triage Summary

Area: area-mvc (F# MVC project template build warning, already labeled)
Type: Bug (F# template emits an unintended deprecation warning after a related change; does not repro in the equivalent C# template)

Regression Info

• Previously working version: .NET 11.0 RC 1
• Broken since: .NET 11.0 RC 2
• The F# MVC template (dotnet new mvc -lang F#) now emits FS0044: This construct is deprecated referencing Razor runtime compilation obsoletion, which did not occur in RC 1. The reporter links this to Mark AddRazorRuntimeCompilation methods obsolete #68841. The C# MVC template does not exhibit the warning.

Potential Duplicates

• None found

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