This event is best used in conjunction with the DrawLasso behavior, which disables standard selection logic. Upon completing a lasso gesture, you might want to trigger immediate actions based on the lassoed area, such as:

• Opening a custom context menu or UI panel styled for bulk operations.
• Creating a visual screenshot / export of only that specific region.
• Implementing custom selection logic or filters (e.g. select nodes of a specific type, or select only links).
• Bookmarking the selected area (adding it to Bookmarks).

DiagramBase Members
DiagramBase Class
MindFusion.Diagramming.Wpf Namespace
Behavior Property
Behavior Enumeration
InitializeLasso Event
SelectionChanged Event