Untitled

$wpfTypes = Add-Type -AssemblyName PresentationFramework -PassThru
$windowsBaseTypes = Add-Type -AssemblyName WindowsBase -PassThru 
$windowsBaseAssembly = $windowsBaseTypes[0].Assembly.Location
$wpfAssembly = $wpfTypes[0].Assembly.Location
$presentationCoreTypes = Add-Type -AssemblyName PresentationCore -PassThru
$presentationCoreAssembly = $presentationCoreTypes[0].Assembly.Location
$systemXamlTypes =  Add-Type -AssemblyName System.Xaml -PassThru
$systemXamlAssembly = $systemXamlTypes[0].Assembly.Location

if ('OutputHelper' -as [type]) { return } else {
    Add-Type -TypeDefinition @'
    using System.Diagnostics;
    using System.Windows;
    using System.Windows.Controls;
    using System.Windows.Threading;

    public class OutputHelper
    {
        public OutputHelper(Window window, TextBox textBox, DispatcherPriority priority)
        {
            Handler = (s, e) => {
                window.Dispatcher.Invoke(() => textBox.AppendText(e.Data + "\n"), priority);
            };
        }

        public DataReceivedEventHandler Handler { get; private set; }
    }
'@ -ReferencedAssemblies $wpfAssembly, $windowsBaseAssembly, $presentationCoreAssembly, $systemXamlAssembly, System.Diagnostics.Process

}


$Xaml = New-Object System.Xml.XmlNodeReader([XML]@"
<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Test" WindowStartupLocation="CenterScreen" ShowInTaskbar="True">
    <Grid>
        <TextBox x:Name="TextBox"/>
    </Grid>
</Window>
"@)

Function Start-Worker {
    $TextBox = $Window.FindName("TextBox")
    $SyncHash = [hashtable]::Synchronized(@{Window = $Window; TextBox = $TextBox})
    $Runspace = [runspacefactory]::CreateRunspace()
    $Runspace.ThreadOptions = "ReuseThread"         
    $Runspace.Open()
    $Runspace.SessionStateProxy.SetVariable("SyncHash", $SyncHash)
    
    $Worker = [PowerShell]::Create().AddScript({
        Start-Transcript
        $process = New-Object System.Diagnostics.Process
        $process.StartInfo.FileName = 'ping.exe'
        $process.StartInfo.Arguments = 'google.com -n 5'
        $process.StartInfo.UseShellExecute = $false
        $process.StartInfo.CreateNoWindow = $true
        $process.StartInfo.RedirectStandardInput = $false
        $process.StartInfo.RedirectStandardOutput = $true
        $process.EnableRaisingEvents = $true

        $process.add_OutputDataReceived(
            
        [OutputHelper]::new($SyncHash.Window, $SyncHash.TextBox, "ContextIdle").Handler
            #$SyncHash.Window.Dispatcher.Invoke( [action]                               { $SyncHash.TextBox.AppendText($_.Data) }, [System.Windows.Threading.DispatcherPriority]::ContextIdle )
            #$SyncHash.Window.Dispatcher.Invoke( [System.Windows.Forms.MethodInvoker]   { $SyncHash.TextBox.AppendText($_.Data) }, [System.Windows.Threading.DispatcherPriority]::ContextIdle )
            #$SyncHash.TextBox.Dispatcher.Invoke( [action]                               { $SyncHash.TextBox.AppendText($_.Data) }, [System.Windows.Threading.DispatcherPriority]::ContextIdle )
            #$SyncHash.TextBox.Dispatcher.Invoke( [System.Windows.Forms.MethodInvoker]   { $SyncHash.TextBox.AppendText($_.Data) }, [System.Windows.Threading.DispatcherPriority]::ContextIdle )
            #$SyncHash.Window.Dispatcher.Invoke( "ContextIdle", [action]{ $SyncHash.TextBox.AppendText($_.Data) } )
            #$SyncHash.TextBox.Dispatcher.Invoke( [System.Windows.Threading.DispatcherPriority]::ContextIdle, [System.Windows.Forms.MethodInvoker]{ $SyncHash.TextBox.AppendText($_.Data) } )
        )
    
        $process.Start() | Out-Null
        $process.BeginOutputReadLine()
        $process.WaitForExit()

        Stop-Transcript
    })
    $Worker.Runspace = $Runspace
    $Worker.BeginInvoke()

}

$script:Window = [Windows.Markup.XamlReader]::Load($Xaml)
$script:TextBox = $Window.FindName("TextBox")
$Window.Add_Loaded({ Start-Worker })

[Void]$Window.ShowDialog()