how to compile a C# code target .NET 5 at runtime?

Question

I tried the example in this link: (Target .NET 5) https://learn.microsoft.com/en-us/dotnet/api/system.codedom.compiler.compilerparameters?view=net-5.0

but it throws PlatformNotSupportedException exception in this line:

// Invoke compilation.
CompilerResults cr = provider.CompileAssemblyFromFile(cp, sourceFile);

Any suggestion to make it works?