backward compatible for .NET 3.5?
in documentation .NET 5.0 is required so we cant use it in .NET 3.5?
For .NET 3.5 please choose NetCore-3.0 branch

i opened NetCore-3.0 solution in VS 16.3.0
and tried to build solution with F6 =

installed core SDKs =

but when i built with right clicked on NetCoreServer, it was successful =

and when i tried to build via bat file, cd build , vs.bat it didnt work too, same sdk 3.1 errors
so what i am missing? guide me pls
I think the answer here is " when i built with right clicked on NetCoreServer, it was successful". Maintaining backwards compatibility can be difficult, and sometimes dangerous. Especially when you add security into the equation.