Gets whether the object has been locked for updating.
true if the control is locked; otherwise, false.
Use the IsUpdateLocked property as a semaphore, signaling that the control is locked for update. It indicates whether the value of an internal counter, used by DateNavigator.BeginUpdate and DateNavigator.EndUpdate methods, is not equal to zero, so that a new modification can not be initiated. Refer to the descriptions of these methods for more information.