При нажатии на кнопку переменная должна увеличиваться на 1 и выводиться в label (PowerShell Studio)

$form1_Load={
    #TODO: Initialize Form Controls here
    $Global:var = 1
}
 
$button1_Click={
    #TODO: Place custom script here
    
    $var = $var + 1
    $label1.Text = $var
}

add-type -ass system.windows.forms
$count = 0
$form = new-object windows.forms.form
$form.autosize = $true
$form.autosizemode = [windows.forms.autosizemode]::growandshrink
$form.formborderstyle = [windows.forms.formborderstyle]::fixedtoolwindow
$form.controlbox = $false
$form.sizegripstyle = [windows.forms.sizegripstyle]::hide
$form.showintaskbar = $false
$form.topmost = $true
$form.startposition = 'CenterScreen'
 
$label = new-object windows.forms.label
$label.text = $count
$label.location = new-object system.drawing.point(3,3)
$label.autosize = $true
$form.controls.add($label)
 
$btn = new-object windows.forms.button
$btn.text = 'Счетчик +'
$btn.location = new-object system.drawing.point(3,30)
$btn.add_click({
    $script:count++
    $label.text = $count
    if ($count -gt 20){$form.close()}
})
$form.controls.add($btn)
$form.showdialog()

$form1_Load={
    #TODO: Initialize Form Controls here
    $Script:var = 1
}
 
$button1_Click={
    #TODO: Place custom script here
    
    $var++
    $label1.Text = $var|out-string
}

Add-Type -AssemblyName PresentationCore,PresentationFramework
[xml]$xaml = @"
<Window Name="main"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="156.456" Width="223.212">
    <Grid Margin="0,0,2,0">
        <Label HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" RenderTransformOrigin="-1.028,-1.353" Width="186" Height="38">
            <Grid Height="38" Margin="0,0,0,0" Width="176">
                <TextBlock HorizontalAlignment="Left"  TextWrapping="Wrap" Text="Счетчик" VerticalAlignment="Top" Height="28" Width="97" FontSize="18" FontFamily="Segoe Script" Margin="10,0,0,0"/>
                <TextBlock Name="Count" Text="0" HorizontalAlignment="Right"  TextWrapping="Wrap" VerticalAlignment="Top" Height="28" Width="48" FontSize="18" FontFamily="Segoe Script"/>
            </Grid>
        </Label>
        <Button Name="inc" Content="Увеличить"  HorizontalAlignment="Left" Margin="10,53,0,0" VerticalAlignment="Top" Width="186" Height="45">          
        </Button>
    </Grid>
</Window>
"@
$reader=(New-Object System.Xml.XmlNodeReader $xaml)
$Window=[Windows.Markup.XamlReader]::Load( $reader )
$xaml.SelectNodes("//*[@*[contains(translate(name(.),'n','N'),'Name')]]") | %{
    Set-Variable -Name ($_.Name) -Value $Window.FindName($_.Name) -Scope Global
}
$inc.add_click({
$Count.text=([int]$Count.text)+1
})
$Window.showdialog()