Unable to set .net core 3.1 to Blazor Webassembly client and shared projects

Question

I installed Visual Studio 2019 Community 16.6.1 (the latest update) at B:\Program Files (x86)\Microsoft Visual Studio\2019\Community on a Windows 10 x64 bit. Afterwards, I also installed dotnet-sdk-3.1.300-win-x64.exe with its default path C:\Program Files\dotnet. They are in different drives.

I create new Blazor Webassembly projects consisting of

• ProjectName.Server with target framework set to .net core 3.1 by default.
• ProjectName.Shared with target framework set to .net core 2.1 by default.
• ProjectName.Client with target framework set to .net core 2.1 by default.

I attempted to change the last two projects above to .net core 3.1 but the target framework dropdown does not provide me with .net core 3.1 option.

Question

Why is there no .net core 3.1 option available to choose? What is wrong?

Answer 1

ProjectName.Shared and ProjectName.Client are .Net Standart and that is not .Net Core