（認(rèn)知有限，如有不妥，還望告知，歡迎討論）

visual result:

=END=

=reference==========

[1]https://learning.oreilly.com/library/view/pro-wpf-4-5/9781430243656/Chapter02.html#s21-21

[2]https://github.com/apress/pro-wpf-4.5-in-csharp