ArcGIS Pro 2.7 API Reference Guide
DropTargetAdorner Class
Members 

ArcGIS.Desktop.Framework.DragDrop Namespace : DropTargetAdorner Class
Represents a drop target adorner. This is an abstract class.
Object Model
DropTargetAdorner ClassDropInfo Class
Syntax
Remarks
Drop targets adorners are the UI elements that appear over a valid drop target. Leaf classes typically override OnRender.
Inheritance Hierarchy

System.Object
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         System.Windows.Media.Visual
            System.Windows.UIElement
               System.Windows.FrameworkElement
                  System.Windows.Documents.Adorner
                     ArcGIS.Desktop.Framework.DragDrop.DropTargetAdorner

Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

DropTargetAdorner Members
ArcGIS.Desktop.Framework.DragDrop Namespace