ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / FeatureSceneLayer Class / GetSelection Method
Example Version

GetSelection Method (FeatureSceneLayer)
Gets the current selection. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public Selection GetSelection()

Return Value

Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
No associated feature service
Remarks
GetSelection() can only be used on feature scene layers that have an associated feature service. Check HasAssociatedFeatureService property to determine if the FeatureSceneLayer has an associated feature service. Calling GetSelection() on a FeatureSceneLayer with no associated feature service will throw a System.InvalidOperationException
Example
Delete all the selected features in FeatureSceneLayer
//must support editing!
//var featSceneLayer = .... ;
if (!featSceneLayer.HasAssociatedFeatureService || 
    !featSceneLayer.IsEditable)
  return;

var delOp = new EditOperation()
{
  Name = "Delete selected features"
};
//Assuming we have a selection on the layer...
delOp.Delete(featSceneLayer, featSceneLayer.GetSelection().GetObjectIDs());
await delOp.ExecuteAsync();//await if needed but not required
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also