C#  Copy Code
public IImage BackgroundImage { get; set; }

Visual Basic  Copy Code
Public Property BackgroundImage As IImage

 Property Value

This image is painted as a background of the diagram, behind the alignment grid and all items. Its position is controlled by the BackgroundImageAlign property. To have the background image appear on printed pages, set the EnableBackgroundImage property of Diagram.PrintOptions to true.

Diagram Members
Diagram Class
MindFusion.Diagramming.Avalonia Namespace
BackgroundImageAlign Property
BackBrush Property