What are examples of a specific (!) implementation of data exchange between two windows through variables in WPF MVVM?

Question

WPF

Let's say there are two viewmodels for the main and dialog box. Given that the table for displaying data is on the main window, how, without deviating from MVVM from the dialog box, to transfer data to the main one?

Answer 1

It's called MessageBus or EventAggregator as an example https://github.com/khellang/Hellang.MessageBus