Consider options for supporting anonymous structs.

[The-Futurist]

In (for example LINQ) numerous scenarios we can create anonymous types with new. However these types are always classes. Could support for creating anonymous structs be added?

[orthoxerox]

Tuples?

[YairHalberstadt]

I rarely use anonymous types now we have tuples. They have pretty much all of the advantages, less overhead, and can be used as return types, type arguments etc.

[juliusfriedman]

I support this as I partially proposed something similar in #2047 though via this proposal by using the (readonly, ref) struct keywords...

Today though, I believe one can already use/contrive a local function to produce a mutable struct which facilitates this feature already where as a lamba produces a class...

IMHO the problem thus would be describing mutability of fields... not trying to specify if I want a class or structure although I agree the ability to be as specific as possible suits C# well.

I question the benefit of either feature proposal though because they only offer syntactic sugar and likely worse performance than if one would simply use a Span with the desired length and extension methods over it to allow access of the fields via those methods as if it were a typed structure....