I've hit this before and facepalmed when I realised what they had done. Records were supposed to work more like immutable product-types in F# and other functio

I've hit this before and facepalmed when I realised what they had done. Records were supposed to work more like immutable product-types in F# and other functional languages, but with this approach it can't be seen as anything other than broken IMHO. Sometimes the csharplang team make some utterly insane decisions. This is the kind of thing that would happen back-in-the-day™ in the name of performance, but in the modern world just adds to the endless list of quirks (like uninitialised structs). I suspect there are elements of the design team that are still stuck in C#1.0/Java mode and so holes like this don't even seem that bad in their minds. But it literally leads to inconsistent data structures which is where bugs live (and potential security issues in the worst cases).