C#  Copy Code
public DiagramView DiagramView { get; set; }

Visual Basic  Copy Code
Public Property DiagramView As DiagramView

 Property Value

The overview control needs a DiagramView reference and not a Diagram one, because a part of the overview functionality is displaying a tracking rectangle that corresponds to the diagram region currently visible inside a view (the viewport). If you need to present to your users a diagram only in overview mode, you must still create an invisible DiagramView and assign it to the Overview control. Alternatively, present a non-interactive DiagramView, by setting Behavior to DoNothing, and apply ZoomToFit.

Overview Members
Overview Class
MindFusion.Diagramming.Blazor Namespace