By default, the DisplayDate  property is False. Use the DisplayDate property to let a property display and edit a date expression. For instance, let's say that your object lists a property of double type, but it changes the date. In this case, you can force the property to display the property as a date, and use the date editor to edit the value for the date. The PropertyChange event notifies your application that user is about to change a property. The control fires the PropertyChanged event when the user changes any property in the control. The DisplayCheck, DisplayColor, DisplayFile or DisplaySlider property specifies whether the property displays a checkbox, color, file, or slider.