The "body" of a property trigger is not code, it is markup.
属性触发器的“主体”是标记，而不是代码。
The property for a property trigger must be a dependency property.
属性触发器的属性必须是一个依赖项属性。
A closely related concept to a property changed event is a property trigger.
与属性更改事件密切相关的一个概念是属性触发器。
A closely related concept to a property changed event is a property trigger.
与属性更改事件密切相关的一个概念是属性触发器。
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