PersistedAssemblyBuilder for .NET 8 and previous versions

[winscripter]

Hello,

Is it possible to use the PersistedAssemblyBuilder type for .NET 8 or previous .NET versions?

The System.Reflection.Emit package on NuGet was last updated in 2019 which does not contain the PersistedAssemblyBuilder type.

[AustinWise]

It would not be possible to backport PersistedAssemblyBuilder as designed to previous versions of .NET or .NET Framework. This is because it's base class, AssemblyBuilder is sealed in previous framework versions (see .NET 6 and .NET Framework docs). It was changed to an abstract class to allow PersistedAssemblyBuilder to inherit from it. See #78542. Note that while issue is marked .NET 8, some later changes like #93497 only made it into .NET 9.