C#程序重新启动（程序重启，非系统重启）

  private void Restart()
        {
            System.Threading.Thread thtmp = new System.Threading.Thread(new System.Threading.ParameterizedThreadStart(run));
            object appName = Application.ExecutablePath;
            System.Threading.Thread.Sleep(2000);
            thtmp.Start(appName);
        }
 
        private void run(Object obj)
        {
            System.Diagnostics.Process ps = new System.Diagnostics.Process();
            ps.StartInfo.FileName = obj.ToString();
            ps.Start();
        }

private void btn_restart_Click(object sender, EventArgs e)
        {
            Application.ExitThread();
            Restart();
        }

调用：

Application.ExitThread();
Restart();