C#中Cookies操作
https://www.cnblogs.com/qcdmwh/p/10653418.html
https://www.cnblogs.com/aitong/p/11648423.html
https://www.cnblogs.com/enych/p/8479263.html
https://blog.csdn.net/y1535623813/article/details/83021984
https://social.msdn.microsoft.com/Forums/zh-CN/74a23f39-ad5c-4058-9f58-1da112333f4d/22914203093371921462webbrowser2001330340cookie?forum=wpfzhchs(很好)
https://blog.csdn.net/hkwlg1314/article/details/52187200(很好)