Hi to everybody.

Just to know how to implement interfaces

Why it must be mandatory to cast the class into the corrispondent implementd interface to access to a member of the (implemented) interface?

NOTE: see teh example here below: its work.

If I follow a solution like the following (i.e. like in C#):

let x = new clsInterface("1")

printf "%s" x.Pippo

x.Pippo <- "10"

printf "%s" x.Pippo

an error occour (VS 2010 Beta 2 and also in VS 2008):

"The field, constructor or member 'Pippo' is not defined"

Do i miss something? Do i perform a error? Or it is mandatory the casting?

Many Thanks in advance.

ANN

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// FSHARP 2.0

type IInterface =

interface

abstract member Pippo : string with get, set

end

type clsInterface( s ) =

class

let mutable _Pippo = System.String.Empty

do

_Pippo <- s

interface IInterface with

member x.Pippo

with get() = _Pippo

and set v = _Pippo <- v

end

end

do

let x = new clsInterface("1")

printf "%s" (x:>IInterface).Pippo

(x:>IInterface).Pippo <- "10"

printf "%s" (x:>IInterface).Pippo