Introduction - If you have any usage issues, please Google them yourself
C# practice routine, string segmentation program
1. In the input box, enter the URL or mailbox, the results box shows whether the input URL or mailbox
2. When the result is a URL, the domain name should be separated, and determine what the site s website (Baidu or Tencent)
3. When the result is a mailbox, what is the mailbox segmentation is displayed, and the account name split display