Xamarin DataPicker how to handle done button click event

I added to my DataPicker unfocused event. And in this event I would like to check if Done button was clicked.

private void DatePicker_Unfocused(object sender, FocusEventArgs e)
        {

        }

Or other option. Is it possible to add listener to button Done, and if was clicked then fired some method?

How can I do it? Thank you.