There is a problem with F#.

First, I code start with "Content - Menu". When I press the "Button with Content" button, the second form with the button start with "Text content...". I close this second form. Then, I press the same button by pressing "Button with Content", I get an error—InvalidOperationException was unhandled. Specified element is already the logical child of another element. Disconnect it first.

#light

open System

open System.Windows

open System.Windows.Controls

let stack1 =

let temp = StackPanel()

let btnText = Button(Content="Text content...")

|> temp.Children.Add |> ignore

temp

let buttonWithContentClick (args:RoutedEventArgs) =

let win = Window(Title="Button with Content",

Width=300.0, Height=200.0, Content=stack1)

win.Show()

let stack =

let temp = StackPanel()

let btnWithContent = Button(Content="Button with Content")

temp.Children.Add(btnWithContent) |> ignore

btnWithContent.Click.Add(buttonWithContentClick)

temp

[<STAThread>]

do

let window = Window(Title="Content - Menu",

Width=350.0, Height=300.0, Content=stack)

window |> Application().Run |> ignore