How do I navigate to a new page from a page in WPF VB.NET

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VB

XAML

WPF

I have a window(MainWindow.xaml) and 2 pages(page1.xaml,page2.xaml).In Page1, i have a button.

Now, i can use this :
    <pre lang="vb">
      Private Sub MainWindow_Loaded(sender As Object, e As RoutedEventArgs) Handles Me.Loaded
      Frame.navigate(new page2)
      End sub

What i want is, i want to navigate to page2 by clicking the button on page1..

Something like this :

'This code is in Page1

 Private sub Btn1_Click handles btn.click
 MainWIndows.Frame.Navigate(new page2)
 End sub

This code doesn't work...One solution i found was to create a frame in page1 first and then navigate to page2 within the frame of page1 whereas i want to use the frame of MainWindow...Any help ?

What I have tried:

Is mentioned in the post .............