How about, I'm with an application and I want to pass the data from one DataGridView to another when I press a button and I also want to add a character of "+" or "-" when I press a button, I'm using the MVVM model in the project.
I appreciate your help.
Greetings
You can share information between different classes in various ways.
You can generate an event by pressing the button you mention and launch the event with its corresponding argument by executing the command that you will have (Binding) the button and subscribe to that event in the class in which you want to receive the object.
Anyway, so that we can help you better, the ideal would be to see what you have done so far and what you have researched, so you will have more help options.