ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMDefinitionFilter Class / DefinitionExpression Property

DefinitionExpression Property (CIMDefinitionFilter)
Gets or sets the definition expression to filter features in the dataset.
Syntax
public string DefinitionExpression {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.3 or higher.
See Also