WPF WPFアプリケーションでWindowsフォームのコントロールを使う

<Window x:Class="WpfUsingWinForm.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:WpfUsingWinForm" 
        xmlns:forms="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
        mc:Ignorable="d"
        Title="MainWindow" Height="600" Width="400">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="Auto"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="30"/>
            <RowDefinition Height="30"/>
        </Grid.RowDefinitions>

        <Button x:Name="wpfButton" Content="検証" Width="60" Height="30"/>

        <WindowsFormsHost Grid.Column="1" Width="300">
            <forms:PropertyGrid x:Name="frmPropertyGrid"/>
        </WindowsFormsHost>
        
        <WindowsFormsHost Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2">
            <forms:DataGridView x:Name="frmDataGridView" 
                                ColumnCount="3"
                                RowCount="3"
                                ColumnHeadersHeight="30"/>
        </WindowsFormsHost>

        <WindowsFormsHost Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2">
            <forms:ProgressBar x:Name="frmProgressBar"
                               Maximum="60"/>
        </WindowsFormsHost>

        <ProgressBar x:Name="wpfProgressBar" 
                     Grid.Row="3"
                     Grid.Column="0" 
                     Grid.ColumnSpan="2"
                     Maximum="60"/>
    </Grid>
</Window>

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

namespace WpfUsingWinForm
{
    /// <summary>
    /// MainWindow.xaml の相互作用ロジック
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            frmPropertyGrid.SelectedObject = wpfButton;

            frmDataGridView.Columns[0].HeaderText = "名前";
            frmDataGridView.Columns[1].HeaderText = "年齢";
            frmDataGridView.Columns[2].HeaderText = "性別";

            frmDataGridView.Rows[0].Cells[0].Value = "山田太郎";
            frmDataGridView.Rows[0].Cells[1].Value = 20;
            frmDataGridView.Rows[0].Cells[2].Value = "男性";

            frmDataGridView.Rows[1].Cells[0].Value = "山田花子";
            frmDataGridView.Rows[1].Cells[1].Value = 25;
            frmDataGridView.Rows[1].Cells[2].Value = "女性";

            frmDataGridView.Rows[2].Cells[0].Value = "高橋一郎";
            frmDataGridView.Rows[2].Cells[1].Value = 30;
            frmDataGridView.Rows[2].Cells[2].Value = "男性";

            timer = new DispatcherTimer();
            timer.Interval = TimeSpan.FromMilliseconds(200);
            timer.Tick += OnTimerTick;

            timer.Start();
        }

        private DispatcherTimer timer = null;

        private int n = 0;
        private void OnTimerTick(object sender, EventArgs e)
        {
            if(n <= frmProgressBar.Maximum)
            {
                frmProgressBar.Value = n;
            }

            if(n <= wpfProgressBar.Maximum)
            {
                wpfProgressBar.Value = n;
            }

            n++;
        }
    }
}