wpf单例及带参数调用

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.Windows;

namespace FM
{
    /// <summary>
    /// App.xaml 的交互逻辑
    /// </summary>
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            Process process = Process.GetCurrentProcess();
            foreach (Process p in Process.GetProcessesByName(process.ProcessName))
            {
                if (p.Id != process.Id)
                {
                    MessageBox.Show("您的程序已经启动");
                    Application.Current.Shutdown();
                    return;
                }
            }



            base.OnStartup(e);

            if (e.Args.Length == 2)
            {
                Arg.ThisWbName = e.Args[0];
                Arg.ThisShtName = e.Args[1];
            }
            //foreach (var item in e.Args)
            //{
            //    MessageBox.Show(item);
            //}


        }
    }

    public class Arg
    {
        public static string ThisWbName { get; set; }
        public static string ThisShtName { get; set; }
    }
}