Name Tuples/Anonymous Types in F#?

I find it easier to do

let route = routes.MapRoute(
    "Default", // Route name
    "{controller}/{action}/{id}" // URL with parameters
    )
route.Defaults.Add("controller", "Home")
route.Defaults.Add("action", "Index")

or

[ "controller", "Home"
  "action", "Index" ]
|> List.iter route.Defaults.Add

In F#, I would avoid calling overloads that accept anonymous types much as I would avoid calling an F# method accepting FSharpList from C#. Those are language-specific features. Usually there is a language-agnostic overload/workaround available.

EDIT

Just looked at the docs–here’s yet another way to do it

let inline (=>) a b = a, box b

let defaults = dict [
  "controller" => "Home"
  "action"     => "Index" 
]
route.Defaults <- RouteValueDictionary(defaults)