Gets the bounding Rect of this DiagramSurface. This such rectangle is the smallest
rectangle that fits all of the diagram elements in this DiagramSurface.
Namespace:
Mindscape.WpfDiagrammingAssembly: Mindscape.WpfDiagramming.Foundation (in Mindscape.WpfDiagramming.Foundation.dll)
Version: 2.0.0.0 (2.0.0.0)