With .NET 7.0 SDK, I cannot create .NET 6.0 web project, the target net6.0 can't be found.

[Andy-Win]

Repro steps:

1. Install latest main build VS from main-32123.28 (Run preinstall command first)
2. Download .NET 7 SDK(7.0.100-alpha.1.22071.3) from main branch of https://github.com/dotnet/installer
3. Open VS, apply feed: https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet7/nuget/v3/index.json
4. Open Command Prompt and run"dotnet new mvc -f net6.0 -o Mvc60" to create ASP.NET Core 6.0 MVC project.

Expected Result
The project should be created successfully.

Actual Result:

dotnet --info

[WenJunJi01]

This issue only occurs on web projects, and creating a .NET 6.0 console/classlib/wpf/winforms project can succeed.

Dotnet info:

[marcpopMSFT]

From Nicole, this is only a web template issue so routing to aspnet
For Andy’s [New]#13105, it only occurs on web projects, and creating a .NET 6.0 console/classlib/wpf/winforms project can succeed

[mkArtakMSFT]

@dougbu any idea why this may be the case?

[mkArtakMSFT]

Also tagging @joeloff in case you have thoughts too

[dougbu]

@wtgodbe wasn't there an issue in earlier 7.0 SDKs relating to net6.0 templates❔

[wtgodbe]

There was an issue a couple weeks ago with net7.0 templates in 7.0 SDKs, before the templates were added, but I don't remember 7.0 SDKs having problems with net6.0, that surprises me. I can try to repro after lunch

[mkArtakMSFT]

@wtgodbe do you have any updates here?

[wtgodbe]

I've confirmed that it repros on the SDK mentioned, but not on an older SDK from October, so something changed recently to introduce this. I'm still investigating

[wtgodbe]

I believe this is related to dotnet/installer#12946, the error doesn't repro on SDKs before we added the net7.0 templates. @dsplaisted do you know where in dotnet/sdk the error described is getting triggered?

[wtgodbe]

Also adding @vlada-shubina for the above question

[dsplaisted]

I think this would be the expected behavior if you just installed the .NET 7 SDK standalone. For the mvc template (and most or all of the ASP.NET ones), you only get the templates for the version of the SDK you have installed. So if you wanted the .NET 6 templates you would also have to install the .NET 6 SDK.

With Visual Studio it works a bit different, so it's possible there's a bug in the setup authoring. But I think the way it's supposed to work in Visual Studio is that you wouldn't get the templates for .NET 6 unless you installed the .NET 6 runtime (as you wouldn't by default be able to run a project targeting 6.0 without the 6.0 runtime).

What versions of the .NET SDK and runtimes are installed? Can you paste the output of dotnet --info from a repro machine?

Also adding @joeloff as he is more familiar with the VS setup authoring.