CreateGui.ps1

#ERASE ALL THIS AND PUT XAML BELOW between the @" "@ 
$inputXML = @" 
<Window 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        
        mc:Ignorable="d"
        Title="Configuration Manager Content Import/Export" Height="564.345" Width="502.66"> 
        <Grid Margin="0,0,0,8">
        <TextBox x:Name="textBox" HorizontalAlignment="Left" Height="23" Margin="135,170,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="325"/>
        <TextBox x:Name="textBox1" HorizontalAlignment="Left" Height="23" Margin="135,235,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="325"/>
        <Button x:Name="button" Content="Import" HorizontalAlignment="Left" Margin="217,311,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="button_Copy" Content="Import" HorizontalAlignment="Left" Margin="217,465,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="button_Copy1" Content="Import" HorizontalAlignment="Left" Margin="217,414,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="button_Copy2" Content="Import" HorizontalAlignment="Left" Margin="217,361,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="button_Copy3" Content="Export" HorizontalAlignment="Left" Margin="338,311,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="button_Copy4" Content="Export" HorizontalAlignment="Left" Margin="338,465,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="button_Copy5" Content="Export" HorizontalAlignment="Left" Margin="338,414,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="button_Copy6" Content="Export" HorizontalAlignment="Left" Margin="338,361,0,0" VerticalAlignment="Top" Width="75"/>
        <Label x:Name="label" Content="Package" HorizontalAlignment="Left" Margin="81,313,0,0" VerticalAlignment="Top" Width="118"/>
        <Label x:Name="label_Copy" Content="Application" HorizontalAlignment="Left" Margin="81,355,0,0" VerticalAlignment="Top" Width="118"/>
        <Label x:Name="label_Copy1" Content="Driver Package" HorizontalAlignment="Left" Margin="81,408,0,0" VerticalAlignment="Top" Width="118"/>
        <Label x:Name="label_Copy2" Content="Task Sequence" HorizontalAlignment="Left" Margin="81,459,0,0" VerticalAlignment="Top" Width="118"/>
        <Label x:Name="label_Copy3" Content="Content Name" HorizontalAlignment="Left" Margin="20,167,0,0" VerticalAlignment="Top" Width="99"/>
        <Label x:Name="label_Copy4" Content="Content Path" HorizontalAlignment="Left" Margin="20,232,0,0" VerticalAlignment="Top" Width="82"/>
        <Image x:Name="image" HorizontalAlignment="Left" Height="71" Margin="154,22,0,0" VerticalAlignment="Top" Width="185" Source="C:\Users\106226\Pictures\MeijerClear.png"/>
        <Label x:Name="label1" Content="This utility will import and export content from your Configuration Manager (Current Branch) Environment." HorizontalAlignment="Left" Margin="99,98,0,0" VerticalAlignment="Top" Width="325"/>
        <Label x:Name="label2" Content="Enter the name of your content." HorizontalAlignment="Left" Height="32" Margin="135,193,0,0" VerticalAlignment="Top" Width="325"/>
        <Label x:Name="label2_Copy" Content="Enter the path to your content. " HorizontalAlignment="Left" Height="32" Margin="135,258,0,0" VerticalAlignment="Top" Width="325" RenderTransformOrigin="0.477,2.395"/>
    </Grid>
</Window>
"@       
 
$inputXML = $inputXML -replace 'mc:Ignorable="d"','' -replace "x:N",'N'  -replace '^<Win.*', '<Window'


[void][System.Reflection.Assembly]::LoadWithPartialName('presentationframework')
[xml]$XAML = $inputXML
#Read XAML
 
    $reader=(New-Object System.Xml.XmlNodeReader $xaml) 
  try{$Form=[Windows.Markup.XamlReader]::Load( $reader )}
catch{Write-Host "Unable to load Windows.Markup.XamlReader. Double-check syntax and ensure .net is installed."}
 
#===========================================================================
# Load XAML Objects In PowerShell
#===========================================================================
 
$xaml.SelectNodes("//*[@Name]") | %{Set-Variable -Name "WPF$($_.Name)" -Value $Form.FindName($_.Name)}
 
Function Get-FormVariables{
if ($global:ReadmeDisplay -ne $true){Write-host "If you need to reference this display again, run Get-FormVariables" -ForegroundColor Yellow;$global:ReadmeDisplay=$true}
write-host "Found the following interactable elements from our form" -ForegroundColor Cyan
get-variable WPF*
}
 
Get-FormVariables
 
#===========================================================================
# Actually make the objects work
#===========================================================================
 
 
#Sample entry of how to add data to a field
 
#$vmpicklistView.items.Add([pscustomobject]@{'VMName'=($_).Name;Status=$_.Status;Other="Yes"})
 
#===========================================================================
# Shows the form
#===========================================================================
write-host "To show the form, run the following" -ForegroundColor Cyan
'$Form.ShowDialog() | out-null'
$Form.ShowDialog() | out-null

Removed the textChanged and ButtonClick properties for one of your textboxes, and buttons respectively. PowerShell doesn't know how to parse them (they get injected by Visual Studio sometimes when you double click a button in the editor, for instance). It renders now!