ArcGIS Pro 2.7 API Reference Guide
SourceCollection Property

ArcGIS.Desktop.Framework.DragDrop Namespace > DragInfo Class : SourceCollection Property
Gets the collection that the source ItemsControl is bound to.
Syntax
public IEnumerable SourceCollection {get;}
Public ReadOnly Property SourceCollection As IEnumerable
Remarks
If the control that initiated the drag is unbound or not an ItemsControl, this will be null.
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

DragInfo Class
DragInfo Members