FixedVariableNotAssigning

#ERASE ALL THIS AND PUT XAML BELOW between the @" "@
$inputXML = @"
<Window x:Class="UserCreation.MainWindow"
        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"
        xmlns:local="clr-namespace:UserCreation"
        mc:Ignorable="d"
        Title="User Creation Tool" Height="445" Width="320">
    <Grid Margin="0,0,2,0">
        <TextBlock x:Name="textBlockTitle" HorizontalAlignment="Left" Height="20" Margin="10,10,0,0" TextWrapping="Wrap" Text="Use this tool to create new users!" VerticalAlignment="Top" Width="290" FontSize="16" TextAlignment="Center"/>
        <Button x:Name="buttonCreate" Content="Create!" HorizontalAlignment="Left" Height="35" Margin="125,350,0,0" VerticalAlignment="Top" Width="75" FontSize="16"/>
        <TextBox x:Name="textBoxLocationCode" HorizontalAlignment="Left" Height="25" Margin="125,90,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="150"/>
        <TextBox x:Name="textBoxFirstName" HorizontalAlignment="Left" Height="25" Margin="125,135,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="150"/>
        <TextBox x:Name="textBoxLastName" HorizontalAlignment="Left" Height="25" Margin="125,180,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="150"/>
        <TextBox x:Name="textBoxJobTitle" HorizontalAlignment="Left" Height="25" Margin="125,225,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="150"/>
        <TextBlock x:Name="textBlockLocationCode" HorizontalAlignment="Left" Height="25" Margin="25,90,0,0" TextWrapping="Wrap" Text="Location Code:" VerticalAlignment="Top"/>
        <TextBlock x:Name="textBlockFirstName" HorizontalAlignment="Left" Height="25" Margin="25,135,0,0" TextWrapping="Wrap" Text="First Name:" VerticalAlignment="Top"/>
        <TextBlock x:Name="textBlockLastName" HorizontalAlignment="Left" Height="25" Margin="25,180,0,0" TextWrapping="Wrap" Text="Last Name:" VerticalAlignment="Top"/>
        <TextBlock x:Name="textBlockJobTitle" HorizontalAlignment="Left" Height="25" Margin="25,225,0,0" TextWrapping="Wrap" Text="Job Title:" VerticalAlignment="Top"/>
        <Button x:Name="buttonVerify" Content="All Info Correct!" HorizontalAlignment="Left" Margin="112,295,0,0" VerticalAlignment="Top" Width="100" Height="25"/>

    </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
#===========================================================================

$WPFbuttonVerify.Add_Click(
    {
        If ($WPFbuttonCreate.Visibility -ne 'Visible'){$WPFbuttonCreate.Visibility = 'Visible'}
        Else {$WPFbuttonCreate.Visibility = 'Hidden'}
    }
)

$WPFbuttonCreate.Visibility = 'Hidden'

#Test Variables
#$LocationCode = "100"
#$FirstName = "Test"
#$LastName = "User"
#$JobTitle = "Manager"

$WPFbuttonCreate.Add_Click({
        Write-Host $LocationCode
    })

#Sample entry of how to add data to a field

#$vmpicklistView.items.Add([pscustomobject]@{'VMName'=($_).Name;Status=$_.Status;Other="Yes"})

#===========================================================================
# Shows the form
#===========================================================================

Function Show-Form{
$Form.ShowDialog() | out-null
}

Show-Form


$LocationCode = $WPFtextBoxLocationCode.Text
$FirstName = $WPFtextBoxFirstName.Text
$LastName = $WPFtextBoxLastName.Text
$JobTitle = $WPFtextBoxJobTitle.Text