ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.Data.DDL Namespace / FieldDescription Class / IsNullable Property

IsNullable Property (FieldDescription)
Indicates if the ArcGIS.Core.Data.Field can contain null values.
Syntax
public bool IsNullable {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.8 or higher.
See Also