ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / MapMemberIDSet Class / Item Property
The MapMember to check.
Example Version

Item Property (MapMemberIDSet)
Gets the list of objectIDs that are contained in the MapMemberIDSet associated with the specified mapMember.
Syntax
public IList<long> this[ 
   MapMember mapMember
]; {get;}

Parameters

mapMember
The MapMember to check.

Property Value

a List of objectIDs.
Example
Get OIDS from a SelectionSet for a given MapMember
if (selSet.Contains(us_zips_layer))
{
  var oids = selSet[us_zips_layer];
}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.4 or higher.
See Also