C#添加开机自启动

//添加启动项

/// <summary>
         /// 开机随系统启动
         /// </summary>
         public void start_with_windows()
         {
             if (start_with_win1.Checked)
             {
                 start_with_win1.Checked = false;
                 start_with_win2.Checked = false;

                 RegistryKey hklm = Registry.LocalMachine;
                 RegistryKey run = hklm.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run", true);

                 if (run.GetValue("校园网登陆器")!= null)
                 {
                     run.DeleteValue("校园网登陆器");
                 }
                 run.Close();
                 hklm.Close();
                
             }
             else
             {
                 RegistryKey hklm = Registry.LocalMachine;
                 RegistryKey run = hklm.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run", true);

                 if (run.GetValue("校园网登陆器") == null)
                 {
                     start_with_win1.Checked = true;
                     start_with_win2.Checked = true;
                     string exeFileName = Application.ExecutablePath;//含可执行文件名
                     run.SetValue("校园网登陆器", exeFileName);
                 }
                 else
                 {
                     run.DeleteValue("校园网登陆器");
                     start_with_win1.Checked = true;
                     start_with_win2.Checked = true;
                     string exeFileName = Application.ExecutablePath;//含可执行文件名
                     run.SetValue("校园网登陆器", exeFileName);
                 }
                 run.Close();
                 hklm.Close();
             }
         }