I\'m a bit beginner in WPF, so I ask this..
Let\'s say I have a window, and inside the window I want to have something like container, could be just border or maybe
To elaborate on @Sheridan's answer, here is a simple TabControl XAML that does what you need:
Result:

You can customize it a little bit by adding this simple Style To your Window.Resources:
Which then results in:

The "WPF Mentality" makes you think the UI controls in terms of their functionality, not their appearance, this is a TabControl =)