c# make navigation?

Question

WPF

They already wrote to me what to do through the page, but I looked on the Internet and it doesn’t work.
It looks like you are flipping through the pages.
And I need to click on the menu - the author
Everything that is currently in the field was removed, and what I needed was opened.
Also about the program.
Screen above.

Answer 1

Through MVVM. For each menu item, create your own ViewModel and your own UserControl, which will be displayed when the VM is "activated"..