Multi constructor for classes in F#
When we define an F# class in explicit way, it's easy for new F# programmers to make this kind of mistakes when they define mult constructors: people will forget to initliza the class first before use it.
type myCls() = //This this a new feature in VS2012,define a property is much easier than before. member val Value = 0 with get,set member this.Print() = printfn "%d" this.Value //Must initilaize the second construct by the default one before set the property Value new(value : int) as this = new myCls() then this.Value <- value