I'm learning F# by tutorials and examples. In the follow case, I cannot figure out the correct syntax for return a new instance of a class. The current syntax is depricated and it is possible that my IDE is causing the issue. I'm running Visual Studio 2010 Beta. The error occurs in the second to last line of code. Any ideas?

*** Code ***

module ArrayMath

type IProcessible =

abstract DimValues: float array with get

abstract Dimensions: int

let calcEuclidean (p1:IProcessible) (p2:IProcessible) =

let sq x = x * x

if p1.Dimensions <> p2.Dimensions then

printfn "%A" "Array dimensions aren't equal."

p2.DimValues

|> Array.fold2

(fun acc x y -> x - y |> sq |> (+) acc)

0. p1.DimValues

|> sqrt

type Points =

{Values: float array;

dimensions: int}

member x.Print = printfn "%A" x.Values

interface IProcessible with

member x.DimValues = x.Values

member x.Dimensions = x.dimensions

let calcPoints (items:'a list when 'a :> IProcessible)

(prevPoints:Points) =

let count = items.Length

if count = 0 then prevPoints else

let mValues =

[|for d in [0..prevPoints.dimensions-1] do

let sum =

items

|> List.fold

(fun acc item -> acc + item.DimValues.[d])

0.

yield sum / (count |> float)|]

let results = { new Points with Values = mValues and dimensions = prevPoints.dimensions }

results