With SDK 10.0 preview 1 and runtime 9.0.0 installed (default configuration for VS 17.14 P1 + SDK 10.0 P1), when you run a 9.0 console app, you get error: you must install or update .NET to run this application.

[EricJia01]

INSTALL STEPS:

1. Clean machine: Win11 x64 ENU 24h2

2. Install SDK 10.0.100-preview.1.25104.3 from https://aka.ms/dotnet/10.0.1xx-preview1/daily/dotnet-sdk-win-x64.exe

3. Apply Feed: https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet10/nuget/v3/index.json

4. Install SDK 9.0.101(include 9.0.0 runtime) from https://dotnet.microsoft.com/en-us/download/dotnet/thank-you/sdk-9.0.101-windows-x64-installer

REPRO STEPS​:
1.Open cmd, create a 9.0 console app by cmd: dotnet new console -f net9.0
2.Then execute dotnet run.

ACTUAL:
Get this result after running the project: You must install or update .NET to run this application.

NOTE:

1. This issue cannot be reproduced on SDK 9.0.102(include 9.0.1 runtime) and SDK 10.0.0 preview 1 installed.
2. This issue cannot be reproduced on 8.0 console app.
3. This issue can be reproduced on Dev 17.14 Preview 1 with 10.0.0-preview 1 SDK installed.
4. This issue can be reproduced on 9.0 Blazor web app/ASP.NET Core Empty/ASP.NET Core Web App (Razor Pages/MVC)

EXPECTED
Can run successfully.

Dotnet info:
.NET SDK:
Version: 10.0.100-preview.1.25104.26
Commit: 96f38f4
Workload version: 10.0.100-manifests.bf5105ba
MSBuild version: 17.14.0-preview-25103-04+66061962d

Runtime Environment:
OS Name: Windows
OS Version: 10.0.22631
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\10.0.100-preview.1.25104.26\

.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.

Host:
Version: 10.0.0-preview.1.25080.5
Architecture: x64
Commit: b98cabca12

.NET SDKs installed:
9.0.101 [C:\Program Files\dotnet\sdk]
10.0.100-preview.1.25104.26 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 9.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.0-preview.1.25103.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 9.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.0-preview.1.25080.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 9.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.0-preview.1.25080.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
None

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

[dotnet-issue-labeler]

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[dotnet-issue-labeler]

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[balachir]

@marcpopMSFT @dsplaisted , can you help investigate? This seems to be a blocking issue for the SDK 10.0 Preview 1 / VS 17.14 Preview 1 release. According to the findings above, this issue reproduces for the following configurations:

1. VS 17.14 Preview 1 (includes SDK 9.0.200-preview and runtime 9.0.0) + SDK 10.0 P1
2. SDK 9.0.101 with runtime 9.0.0 + SDK 10.0 P1

Configuration 1 above is the important one as that's the default behavior right now for VS 17.14 P1.

Including @richaverma1 and @leecow for awareness.