silverlight 4.0 的oob模式下，调用com通过wmi重启自身进程 killself

silverlight目前开发的应用，想做到系统内注销后自动重新启动下 sllauncher.exe ，实现方式是通过WMI的COM接口，获取到当前应用的执行命令行（CommandLine）；并通过shell运行；代码如下：

#region Using Section

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices.Automation;
using System.Windows;

#endregion

namespace KillSelf
{
    public class ComObjectHelper
    {
        private static List<string> GetProcess()
        {
            var result = new List<string>();
            try
            {
                dynamic objLocator = AutomationFactory.CreateObject("WbemScripting.SWbemLocator");

                dynamic objWmiService = objLocator.ConnectServer(".", "root\\cimv2");

                dynamic query =
                    objWmiService.ExecQuery("Select * from Win32_Process");

                foreach (dynamic o in query)
                {
                    //string value = "ExecutablePath = " + o.CommandLine + "\r\n";
                    //Console.WriteLine(value);

                    result.Add(o.CommandLine + "");
                }

                return result;
            }
            catch (Exception ex)
            {
                MessageBox.Show("Get Process:" + ex.Message);
            }
            return null;
        }

        internal static void Exec(string cmdline)
        {
            try
            {
                dynamic cmd = AutomationFactory.CreateObject("WScript.Shell");
                cmd.Run(cmdline, , false);
            }
            catch (Exception ex)
            {
                MessageBox.Show("Execute Process:" + ex.Message);
            }
        }

        public static SlProcess GetSelf()
        {
            string[] procs = GetProcess().ToArray();

            foreach (string p in procs)
            {
                string cmdline = p.ToLower();
                if (cmdline.IndexOf("sllauncher.exe", StringComparison.Ordinal) != -)
                {
                    return new SlProcess(cmdline);
                }
            }
            throw new NullReferenceException("未找到SLLauncher.exe进程");
        }
    }

    public class SlProcess
    {
        public SlProcess(string cmdline)
        {
            CommandLine = cmdline;
        }

        public string CommandLine { get; set; }

        public SlProcess Run()
        {
            ComObjectHelper.Exec(CommandLine);
            return this;
        }

        public SlProcess Kill()
        {
            Application.Current.MainWindow.Close();
            return this;
        }
    }
}

调用部分：

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (!Application.Current.IsRunningOutOfBrowser)
            {
                MessageBox.Show("Not Running OutOfBrowser!!");
                return;
            }

            ComObjectHelper.GetSelf().Run().Kill();
        }