ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Data Namespace / Field Class / IsNullable Property
Version

IsNullable Property (Field)
Gets a value indicating whether this field can contain null values.
Syntax
public bool IsNullable {get;}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also