How can "Click To Add Appointment" be disabled in WPF?
There's no property currently exposed to disable it but the element is a ClickToAddActivityElement so you could change its template to not have anything visible or set its Opacity/IsHitTestVisible so it won't be visible or interactive. E.g.
<Style TargetType="igPrim:ClickToAddActivityElement"> <Setter Property="Opacity" Value="0" /> <Setter Property="IsHitTestVisible" Value="False" /></Style>