F# Type and Module Extensions Adding new functions to existing modules and types using Modules
Example
Modules can be used to add new functions to existing Modules and Types.
namespace FSharp.Collections
module List =
let pair item1 item2 = [ item1; item2 ]
The new function can then be called as if it was an original member of List.
open FSharp.Collections
module Testing =
let result = List.pair "a" "b"
// result is a list containing "a" and "b"
