One way vs Two way

Use OneWay if you only want to update the view from your model.

TwoWay also updates the model if you change the view. e.g. a TextBox. So you should use it when you want that your view can affect the model.

https://stackoverflow.com/questions/27803448/data-binding-one-vs-two-way

https://www.tutorialspoint.com/wpf/wpf_data_binding.htm