+ member this.ReturnFrom (x) = x
+
+ member this.TryFinally (body, compensation) =
+ try this.ReturnFrom(body())
+ finally compensation()
+
+ member this.Using (disposable: 'a when 'a :> IDisposable, body) =
+ let body' = fun () -> body disposable
+ this.TryFinally(body', fun () ->
+ match disposable with
+ | null -> ()
+ | disp -> disp.Dispose())
+
+ member this.Zero () =
+ None
+
+ member this.Return (x) =
+ Some x
+
+let maybe = new MaybeBuilder()
\ No newline at end of file