Why is the new Tuple type in .Net 4.0 a reference type (class) and not a value type (struct)

Question

Does anyone know the answer and/or have an opinion about this?

Since tuples would normally not be very large, I would assume it would make more sense to use structs

Answer 1

I don't know but if you have ever used F# Tuples are part of the language. If I made a .dll and returned a type of Tuples it be nice to have a type to put that in. I suspect now that F# is part of the language (.Net 4) some modifications to CLR were made to accommodate some common structures in F#

From http://en.wikibooks.org/wiki/F_Sharp_Programming/Tuples_and_Records

let scalarMultiply (s : float) (a, b, c) = (a * s, b * s, c * s);;

val scalarMultiply : float -> float * float * float -> float * float * float

scalarMultiply 5.0 (6.0, 10.0, 20.0);;
val it : float * float * float = (30.0, 50.0, 100.0)