如何从另一个WPF窗口向另一个WPF窗口发送字符串或任何其他值？

This was easier in Windows Forms. So I have a tabbed program. And I added a feature to rename a tab. When they rename a tab it directs you to a new WPF Window and they set the name there, if they click 'Enter' the dialog result would be true and in the the main window the code is This was easier in Windows Forms. So I have a t