[Sandbox] It was not possible to find any compatible framework version

[gracechen]

Got the sample code from github according to the instructions from Microsoft learning path. Edited the code necessary but could not run. The github location is https://github.com/MicrosoftDocs/mslearn-expose-hybrid-services-with-azure-relay. Herewith the error message:
____________________________________________________________________________________________________________________________
dotnet bin/Debug/netcoreapp2.2/listener.dll
It was not possible to find any compatible framework version
The framework 'Microsoft.NETCore.App', version '2.2.0' was not found.
- The following frameworks were found:
3.1.9 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]

You can resolve the problem by installing the specified framework and/or SDK.

The specified framework can be found at:
- https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=2.2.0&arch=x6...

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This issue occurred in several learning contents which stop me from continuing my study.

Kindly assist.

Thank you.

[#2]

حاول البداية من جديد

[#3]

I'm experiencing the same issue.  Watching for some assistance.  

[#4]

@gracechen the following work around worked in my case.

Locate the .csproj file (might be more than one, in which case do the same to each)

Locate the following line

<TargetFramework>netcoreapp2.2</TargetFramework>

Change it to 

<TargetFramework>netcoreapp3.1</TargetFramework>

Save, Close and Try again

Hope this helps

[#5]

@gracechen 

I have the same issue and can not accomplish some of my learn sandbox tests because of that.

The tip from @george1251 couldn't help this issue.

[#6]

THis worked for me. I edtied the .csproj file during the exercise

https://docs.microsoft.com/en-gb/learn/modules/monitor-diagnose-and-troubleshoot-azure-storage/4-exe...

and it ran.

MAny thanks

[#7]

Thanks!
It works!
https://docs.microsoft.com/en-us/learn/modules/app-service-scale-up-scale-out/3-exercise-scale-a-web...