ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / MapMemberIDSet Class / Contains Method / Contains(MapMember) Method
The MapMember to check.
Example Version

Contains(MapMember) Method
Determines if records from the specified mapMember are in the MapMemberIDSet.
Syntax
public bool Contains( 
   MapMember mapMember
)

Parameters

mapMember
The MapMember to check.
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