To match the article, you'd want to directly emit the Intermediate Language (IL) tokens with something like this: https://learn.microsoft.com/en-us/dotnet/api/system.reflecti...

I haven't found any authoritative source, but I strongly suspect that the .NET bytecode format has 32-bit limits all over the place. Maaaybe you could break up the code into functions less than 1 GB in size and then chain them together.