Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation bug with AddRazorRuntimeCompilation() to an ASP.NET Core Web App (MVC) project

[RobertoFalconi]

Is there an existing issue for this?

• [X] I have searched the existing issues

Describe the bug

I made a brand new .NET 6 project with VS22, I added Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation package (version 6.0.1) from NuGet to the project, then I have added in the Program.cs:

var builder = WebApplication.CreateBuilder(args); builder.Services.AddControllersWithViews().AddRazorRuntimeCompilation();

and the result is that Bootstrap' layout "crashes": the footer is no more fixed to the bottom of the page, the header doesn't have the shadow anymore and so on. It follows a screenshot of the crashed page:

Expected Behavior

This is what the page should look like instead:

Steps To Reproduce

Just make a brand new ASP.NET Core Web App (MVC) with .NET 6, with both HTTPS and Docker support:

We now have this:

Then install the Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation package (version 6.0.1) from NuGet to the project:

Finally the command AddRazorRuntimeCompilation();

And the result will be:

Exceptions (if any)

No response

.NET Version

.NET 6.0

Anything else?

ASP.NET Core 6 Visual Studio Professional 2022

Ask me for anything

[mkArtakMSFT]

Thanks for contacting us. This is because Runtime Compilation doesn't support Scoped CSS.

[mkArtakMSFT]

Reopening this and moving to backlog

[ghost]

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.