Windows forms problem - Unable to load Windows.Markup.XamlReader - powershell

Question

Please can you help me?
The code makes this output error:
Unable to load Windows.Markup.XamlReader
This code is made by Microsoft Visual Studio - Project WPF APP
[void][System.Reflection.Assembly]::LoadWithPartialName('presentationframework')
[xml]$XAML = #"
<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"
xmlns:local="clr-namespace:WpfApp2"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Grid>
<Label Name="label1" Content="Label" HorizontalAlignment="Left" Margin="222,102,0,0" VerticalAlignment="Top" Width="92"/>
<Label Name="label2" Content="Label" HorizontalAlignment="Left" Margin="222,177,0,0" VerticalAlignment="Top" Width="92"/>
<Label Name="label3" Content="Label" HorizontalAlignment="Left" Margin="222,246,0,0" VerticalAlignment="Top" Width="92"/>
<TextBox Name="text1" HorizontalAlignment="Left" Margin="369,110,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="120" TextChanged="text1_TextChanged_1"/>
<TextBox Name="text2" HorizontalAlignment="Left" Margin="369,185,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="120" RenderTransformOrigin="0.483,4.29"/>
<TextBox Name="text3" HorizontalAlignment="Left" Margin="369,254,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="120" RenderTransformOrigin="0.483,4.29"/>
<Button Name="button1" Content="Button" HorizontalAlignment="Left" Margin="572,168,0,0" VerticalAlignment="Top" Width="131" Height="46"/>
</Grid>
</Window>
"#
#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"; exit}
# Store Form Objects In PowerShell
$xaml.SelectNodes("//*[#Name]") | ForEach-Object {Set-Variable -Name ($_.Name) -Value $Form.FindName($_.Name)}
#Show Form
$Form.ShowDialog() | out-null