在catch中捕获了异常后重启应用程序

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Diagnostics;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private List<string> strs = null;

        private void Form1_Load(object sender, EventArgs e)
        {
            strs = new List<string>();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            try
            {
                int num = int.Parse(lblSecondCount.Text);
                num++;
                strs.Add("a");
                lblSecondCount.Text = num.ToString();
                if (num == 5)
                {
                    timer1.Enabled = false;
                    throw new Exception("5秒了,抛出异常!");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                MessageBox.Show("即将重新启动应用程序!");
                this.Close();

                /* 以下两种方式都可以重启应用程序 */

                // 方式一
                Restart();

                // 方式二
                Run2();
            }
        }

        private void Restart()
        {
            Thread thtmp = new Thread(new ParameterizedThreadStart(Run1));
            object appName = Application.ExecutablePath;
            Thread.Sleep(2000);
            thtmp.Start(appName);
        }

        private void Run1(Object obj)
        {
            Process ps = new Process();
            ps.StartInfo.FileName = obj.ToString();
            ps.Start();
        }

        private void Run2()
        {
            ProcessStartInfo psi = new ProcessStartInfo();
            psi.WorkingDirectory = Application.StartupPath;
            psi.FileName = Application.ExecutablePath;
            psi.Arguments = "";
            try
            {
                Process.Start(psi);
            }
            catch (System.ComponentModel.Win32Exception ex)
            {
                MessageBox.Show(ex.Message);
                return;
            }
        }
    }
}