title: Access a parent window control(e.g a Label) inside Child page
body: <p><img src="https://i.stack.imgur.com/0nfAV.jpg" alt="enter image description here">I am developing a WPF application where i have a MainWindow that has a Frame control and a Label Control inside it, i have set the source of the Frame control to one of the pages i have created, what i want is to be able to change the content of Label control (inside Main window) from my Page.xaml which is displayed inside the Frame control.</p>
  
  <p>Here is an Image to further illustrate what i really want . excuse my drawing!!</p>