Open content of Tabitem in new Window

Question

What i want to do is open a new window exactly the same as my TabItem. I tried this:

Window wnd = new Window();
var cnt = tabItem1.Content;
wnd.Content = cnt;
wnd.Show();

After button click it open nice new window with tab control content, but content in my main window disappear. When I switch to another tab item in my main window and again to TabItem1 everything is ok in main window, but "new window" is empty then.

Answer 1

You can't use that code. Each WPF control can't have more than one parent in the logical (or visual) tree. Take a look here . You should use a template in order to have the same content both in your Tab Control and in your Window.