通过读取注册表获得 MediaPlayer the highest version.

using System;
using Microsoft.Win32;

namespace PublicBill.RegeditAction
{
    class RegeditAction
    {
        [STAThread]
        static void Main(string[] args)
        {
            string mediaPlayerVersion = new RegeditAction().GetRegeditData();

            Console.WriteLine("Windows Media Player Version: " + mediaPlayerVersion);
        }

        /**//// <summary>
        /// Get local machine the highest version of media player.
        /// </summary>
        /// <returns></returns>
        private string GetRegeditData()
        {
            RegistryKey localMachine = Registry.LocalMachine;
            RegistryKey software = localMachine.OpenSubKey("SOFTWARE");
            RegistryKey microsoft = software.OpenSubKey("Microsoft");
            RegistryKey mediaPlayer = microsoft.OpenSubKey("MediaPlayer");
            RegistryKey playerUpgrade = mediaPlayer.OpenSubKey("PlayerUpgrade");

            string registData = playerUpgrade.GetValue("PlayerVersion", "have no this value.").ToString();

            return registData;
        }

    }
}