Please make an option to disable the PromptChar (Placeholder) in the NumericField. It is annyoning, when I want to enter a number, and always a placeholder is shown. Also when the PromptChar=" " is an empty space, it looks strange when the field value is selected and some empty spaces are selected.
https://es.infragistics.com/community/forums/f/ultimate-ui-for-wpf/118577/xamdatagrid---numericfield-why-is-promptchar-x-null-not-working/527629#527629