I feel like I'm missing something because this is very basic behaviour: when I drop down the DateTimePicker (using default property values) to input the date and time, I cannot input both at one time.  This is because when switching to the Time tab, the date is reset to the original value, and when switching to the Date tab the time is reset to the original value.  So to change both the date and time, one must first edit the date, press Ok, then edit the time, and press Ok.  I thought this might have something to do with the binding, but the Telerik Example app does the same thing.

Is there a way to have the picker keep the edited value when switching between the tabs?