1: let res = 
2:   [ 1 .. 10 ] 
3:   |> List.filter isEven
4:   |> List.map formatInt

val res : string list

Full name: Test.res

  type: string list
  implements: System.Collections.IStructuralEquatable
  implements: System.IComparable<List<string>>
  implements: System.IComparable
  implements: System.Collections.IStructuralComparable
  implements: System.Collections.Generic.IEnumerable<string>
  implements: System.Collections.IEnumerable

Multiple items
module List

from Microsoft.FSharp.Collections

--------------------

type List<'T> =
  | ( [] )
  | ( :: ) of 'T * 'T list
  with
    interface System.Collections.IEnumerable
    interface System.Collections.Generic.IEnumerable<'T>
    member Head : 'T
    member IsEmpty : bool
    member Item : index:int -> 'T with get
    member Length : int
    member Tail : 'T list
    static member Cons : head:'T * tail:'T list -> 'T list
    static member Empty : 'T list
  end

Full name: Microsoft.FSharp.Collections.List<_>

  type: List<'T>
  implements: System.Collections.IStructuralEquatable
  implements: System.IComparable<List<'T>>
  implements: System.IComparable
  implements: System.Collections.IStructuralComparable
  implements: System.Collections.Generic.IEnumerable<'T>
  implements: System.Collections.IEnumerable

val filter : ('T -> bool) -> 'T list -> 'T list

Full name: Microsoft.FSharp.Collections.List.filter

val isEven : int -> bool

Full name: Test.isEven

val map : ('T -> 'U) -> 'T list -> 'U list

Full name: Microsoft.FSharp.Collections.List.map

val formatInt : int -> string

Full name: Test.formatInt