How to manage page object from the other user control

I have a problem. I want to create a toolbar.xaml user control. I open a page in content of TabItem In mainpage.xaml. How c开发者_如何学JAVAan access and manage this page from the toolbar user control. Please help. thanks..

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either user static variables in parent control and call them directly in the child one.

or raise EventHandlers from child control and subscribe them in parent control.