Behavior note

1

https://tocsworld.wordpress.com/2014/07/02/wpf-%E3%83%93%E3%83%98%E3%82%A4%E3%83%93%E3%82%A2-%E3%81%AA%E3%82%8B%E3%82%82%E3%81%AE/

https://anopara.net/2014/06/20/cool-behavior-life/

http://blog.okazuki.jp/entry/20100823/1282561787