A proper way to implement item editors

For example we have some busines object we want to edit. Editing occures in separate dialog.
Dialog has a ViewModel containing as a property this BusinesObject.
Dialog contains some fields(TextBoxes, ComboBoxes e.t.c.).
What is the best way to implement editing of BusinesObject?

First approatch I have in mind: Create a clone of object. On accepting editings copy value of clone to original one. Is this ok for MVVM? So all my BusinessObject ViewModels have to be IClonable?

via Chebli Mohamed