My approach has always been to create a separate dll (written in C++) that wraps all the complicated stuff and has only a few calling points exposed which were

My approach has always been to create a separate dll (written in C++) that wraps all the complicated stuff and has only a few calling points exposed which were P/Invoked from the C# side. Haven’t had to do much of this but that definitely saved me from doing a lot of clunky stuff in the C# app