ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / SubtypeFeatureLayerCreationParams Class / SubtypeId Property

SubtypeId Property
Gets and sets subtype id. You must provide an existing subtype id.
Syntax
public int SubtypeId {get; set;}
Remarks
This is a required property.
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.4 or higher.
See Also