How to access WPF controls from standard CS file

Question

Hello there,

Again, need your hands.

I have one WPF application that will invoke some methods hosted in second AppDomain, now, I want to access one WPF control (ProgressBar) from one separate class file(not code-behind), which extends from MarshalByRefObject, I need to do this like below:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace WpfListenerCrossDomain
{
    public class EventSink : MarshalByRefObject
    {


        public void WatchProgress(object sender, EventArgs e)
        {
            //Console.WriteLine("There is a Progress!!");
            // Here, I need to update wpfProgressBar, how to do?
        }
    }

}


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using WpfRemoteServer;
using System.Reflection;

namespace WpfListenerCrossDomain
{

    /// <summary>

    /// Interaction logic for Window1.xaml

    /// </summary>

    public partial class Window1 : Window
    {


        EventSink m_sink;

        public Window1()
        {
            InitializeComponent();

            m_sink = new EventSink();
        }

        private void btnCreate2domain_Click(object sender, RoutedEventArgs e)
        {


            AppDomain  ad2 = AppDomain.CreateDomain("domain2", null, null);

            SampleRemote romoteobj = (SampleRemote)ad2.CreateInstanceAndUnwrap("WpfRemoteServer", "WpfRemoteServer.SampleRemote");

            romoteobj.UpdateProgressEvent += new WpfRemoteServer.SampleRemote.OnUpdatePregress(m_sink.WatchProgress);

            romoteobj.MethodA();

        }
    }
}


<Window x:Class="WpfListenerCrossDomain.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <Grid>
        <Button Name="btnCreate2domain" Click="btnCreate2domain_Click">

        </Button>
        <ProgressBar Name="wpfProgressBar" Minimum="0" Maximum="100" Width="250" Height="25" Margin="20,0,0,0" />
    </Grid>
</Window>

Another one (B):

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

namespace WpfRemoteServer
{
    public class SampleRemote : MarshalByRefObject
    {
        public delegate void OnUpdatePregress(object sender, EventArgs e);
        public event OnUpdatePregress UpdateProgressEvent;

        public void MethodA()
        {
            Console.WriteLine("Running in domain:" + Thread.GetDomain().FriendlyName);

            if (UpdateProgressEvent != null)
            {
                UpdateProgressEvent(this, new EventArgs());
            }
        }
    }
}

Thanks, Kent