How to add a button on the right side of the combo box?
如何在组合框右侧添加按钮?
Sometimes this button is very useful!
有时这个非常有用。

Describe the solution you'd like
The IsEnabledButton property directly determines whether the Button is enabled. After it is displayed, you can bind the ButtonCommand
通过IsEnabledButton属性直接确定Button是否启用。显示后可以绑定ButtonCommand