WPF

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <Menu Height="36" Name="menu1" Margin="12,0,439,197">
            <MenuItem Header="_File" Height="22" Name="menuitem1" Width="200" Margin="10, 10, 5, 5" HorizontalAlignment="Left" VerticalAlignment="Top" Background="Chocolate">
                <MenuItem Header="Save..."  Click="MenuItem_Click"/>
            </MenuItem>
        </Menu>
        <Canvas Height="156" HorizontalAlignment="Left" Margin="81,77,0,0" Name="canvas1" VerticalAlignment="Top" Width="304" Background="#FF945050">
            <Button Canvas.Left="128" Canvas.Top="49" Content="Button" Height="23" Name="button1" Width="75" Click="button1_Click" />
            <TextBox Canvas.Left="48" Canvas.Top="128" Height="23" Name="textBox1" Width="120" />
        </Canvas>
    </Grid>
</Window>

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 System.Windows.Threading;

namespace WpfApplication1
{
	/// <summary>
	/// Interaction logic for MainWindow.xaml
	/// </summary>
	public partial class MainWindow : Window
	{
		public MainWindow()
		{
			InitializeComponent();
		}

		private void button1_Click(object sender, RoutedEventArgs e)
		{
			System.Windows.Forms.Form form = new System.Windows.Forms.Form();
			form.Height = 200;
			form.Width = 400;
			form.TopMost = true;
			form.Show();
		}

		private void MenuItem_Click(object sender, RoutedEventArgs e)
		{
			string fileName = SaveFileDialog();
			UiServices.SetBusyState();
			System.Threading.Thread.Sleep(3000);
		}

		private string SaveFileDialog()
		{
			// Create SaveFileDialog
			Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog();

			// Display SaveFileDialog by calling ShowDialog method
			Nullable<bool> result = dlg.ShowDialog();

			string filename = string.Empty;
			// Get the selected file name 
			if (result == true)
			{
				// Open document
				filename = dlg.FileName;
			}
			return filename;
		}
	}

	/// <summary>
	/// Sets the busy state on the application.
	/// Displays a wait cursor for long running tasks.
	/// </summary>
	public static class UiServices
	{
		/// <summary>
		/// A value indicating whether the UI is currently busy
		/// </summary>
		private static bool _isBusy;

		/// <summary>
		/// Sets the state as busy.
		/// </summary>
		public static void SetBusyState()
		{
			SetBusyState(true);
		}

		/// <summary>
		/// Sets the state to busy or not busy.
		/// </summary>
		/// <param name="busy">if set to <c>true</c> the application is now busy.</param>
		private static void SetBusyState(bool busy)
		{
			if (busy != _isBusy &&
				Application.Current != null &&
				Application.Current.Dispatcher != null)
			{
				_isBusy = busy;
				Mouse.OverrideCursor = busy ? Cursors.Wait : null;

				if (_isBusy)
				{
					new DispatcherTimer(TimeSpan.FromSeconds(0), DispatcherPriority.ApplicationIdle, DispatcherTimer_Tick, Application.Current.Dispatcher);
				}
			}
		}

		/// <summary>
		/// Handles the Tick event of the dispatcherTimer control.
		/// </summary>
		/// <param name="sender">The source of the event.</param>
		/// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
		private static void DispatcherTimer_Tick(object sender, EventArgs e)
		{
			var dispatcherTimer = sender as DispatcherTimer;
			if (dispatcherTimer != null)
			{
				SetBusy(false);
				dispatcherTimer.Stop();
			}
		}		
	}
}

public bool CanEnableField(string Key)
{
    // if the form is in Add or Edit Mode, and the user has rights to the field, then
    // return true, else false
}

foreach (var jobClass in Classes)
{
    if (jobClass.Id == JobRevision.JobClass.Id)
    {
        SelectedClass = jobClass;
        break;
    }
}