The Infragistics.Controls.Schedules.Primitives.ActivityRecurrenceDialogCore can be displayed in read-only mode where the user is not allowed to modify the contents. You can force the dialog to be read-only by setting this property to false or force the dialog to be modifiable by setting this property to true.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2