ArgumentNullExceptionn in the RadPropertyValuesCollection class.
this.radDiagram1.DiagramElement.BringIntoView(new Rect(new Telerik.Windows.Diagrams.Core.Point(left, top), new Telerik.Windows.Diagrams.Core.Point(right, bottom)), true);this.radDiagram1.DiagramElement.BringIntoView(new Rect(new Telerik.Windows.Diagrams.Core.Point(left, top), new Telerik.Windows.Diagrams.Core.Point(right, bottom)), false);