该行:

this.AddHandler(UIElement.TappedEvent, new TappedEventHandler(Page02_CloseButtonTapped), true);

将MainPage的轻击事件与Page02_CloseButtonTapped方法相关联.因此，任何点击事件都会触发该方法.

is associating the tapped event of the MainPage to Page02_CloseButtonTapped method. So any tap event on it will fire the method.

我假设您打算将其附加到Page02控件的CloseButtonTapped事件上?

I'm assuming you meant to attach it to the CloseButtonTapped event on the Page02 control instead?