Some users report the csproj files are not getting loaded

[carlossanlop]

Some people are reporting that the tool is not working for them because they are seeing this error when the tool attempts to load the Project instance:

Diagnostic messages found in workspace.OpenProjectAsync - 
D:\runtime\src\libraries\System.Runtime.Intrinsics\src\System.Runtime.Intrinsics.csproj: 
Failure - Msbuild failed when processing the file 'D:\runtime\src\libraries\System.Runtime.Intrinsics\src\System.Runtime.Intrinsics.csproj'
with message: The SDK resolver type "WorkloadSdkResolver" failed to load.
Could not load file or assembly 'System.Runtime, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
The system cannot find the file specified. 

Santi and I are investigating it.

[carlossanlop]

We have narrowed down this issue to machines where 6.0 Prev1 is the latest SDK installed. In machines where 5.0 is the latest SDK, it does not repro.

I know this is the case for @tannergooding . @eiriktsarpalis is this your case too?

We are asking the team that owns the problematic APIs to help us with this issue.

[ericstj]

Could be caused by the recent changes to pre-req 6.0 preview 1 for dotnet/runtime. If I had to guess it looks like you're loading the latest (6.0) MSBuild in a 5.0 process. Do you need to run in proc? If you need to run in proc then the tool will likely need to run on the same framework version as is pre-req'ed by the repo's global.json.

[ericstj]

I hit this and was able to workaround it by making the app target net6.0.