如何从C#以编程方式刷新Windows桌面？

using System;
using System.Runtime.InteropServices;

namespace RefreshDesktop
{
    class Program
    {
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        private static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);

        private const int WM_SYSCOMMAND = 0x0112;
        private const int SC_MONITORPOWER = 0xF170;
        private const int HWND_BROADCAST = 0xFFFF;

        static void Main(string[] args)
        {
            RefreshDesktop();
        }

        static void RefreshDesktop()
        {
            SendMessage((IntPtr)HWND_BROADCAST, WM_SYSCOMMAND, (IntPtr)SC_MONITORPOWER, (IntPtr)2);
        }
    }
}